Medicine - kembara Xtra

Published on: September 20, 2026

Ophthalmology – Phacoanaphylactic Glaucoma

Ophthalmology – Phacoanaphylactic Glaucoma

Basics

Description

Phacoanaphylactic glaucoma is an older term for secondary glaucoma occurring with phacoantigenic uveitis, an immune-mediated granulomatous inflammation directed against exposed lens proteins after disruption of the lens capsule.

Preferred modern terminology includes:

Phacoantigenic uveitis
Lens-induced uveitis with secondary glaucoma

The historical term phacoanaphylactic endophthalmitis is misleading because the reaction is not a true IgE-mediated anaphylactic process.

The disorder typically follows:

Cataract surgery with retained lens material
Penetrating or blunt trauma causing lens capsule rupture
Rare spontaneous lens capsule disruption

Clinical Importance

The characteristic clinical combination is:

Persistent granulomatous anterior uveitis + elevated IOP after disruption of the lens capsule

The principal management goals are to:

Suppress inflammation.
Control IOP.
Identify and remove residual lens material when present.
Exclude infectious postoperative endophthalmitis.

Epidemiology

The condition is uncommon in modern cataract surgery because of:

Improved phacoemulsification
Better removal of cortical material
Smaller incisions
Improved vitreoretinal management of dropped lens fragments

It is more likely after:

Complicated cataract surgery
Posterior capsule rupture
Retained lens fragments
Lens trauma

Terminology

Several lens-induced inflammatory glaucomas must be distinguished.

Phacoantigenic Uveitis

Immune-mediated granulomatous inflammation
Requires lens capsule disruption
Usually follows surgery or trauma
Secondary glaucoma may occur

Lens-Particle Glaucoma

Trabecular obstruction by lens particles and inflammatory cells
Usually after surgery or trauma
Less dependent on a specific immune sensitization mechanism

Phacolytic Glaucoma

Occurs with a hypermature cataract
Capsule is usually grossly intact
Leakage of high-molecular-weight lens proteins produces macrophage-mediated trabecular obstruction

These entities may overlap clinically.

Pathophysiology

Normally, lens proteins are relatively sequestered from the immune system.

When the capsule is disrupted:

Lens proteins become exposed to the immune system

This can trigger a:

Delayed immune response
Granulomatous inflammatory reaction

Histologically, inflammation develops around lens material.

Mechanism of Glaucoma

IOP may rise because of:

Inflammatory cells obstructing the trabecular meshwork
Macrophages containing lens material
Free lens particles
Lens proteins
Trabeculitis
Peripheral anterior synechiae
Posterior synechiae with secondary pupillary block in selected cases
Steroid response during treatment

Therefore the glaucoma may be:

Open-angle
Secondary angle-closure
Mixed mechanism

Etiology

Typical precipitating events include:

Cataract surgery
Posterior capsule rupture
Dropped nuclear fragments
Retained cortical material
Penetrating ocular trauma
Traumatic lens rupture

Rarely, spontaneous capsular rupture may occur.

History

Ask specifically about:

Recent cataract surgery
Complicated phacoemulsification
Posterior capsule rupture
Retained lens fragments
Pars plana vitrectomy
Ocular trauma
Previous episodes of uveitis

Symptoms may include:

Ocular pain
Photophobia
Redness
Blurred vision
Halos
Headache if IOP is markedly elevated

Timing

Presentation may occur:

Days
Weeks
Occasionally longer

after lens capsule disruption.

Persistent or recurrent postoperative inflammation should raise suspicion for:

Retained lens material
Phacoantigenic uveitis
Chronic postoperative endophthalmitis
TASS

Physical Examination

Typical findings include:

Ciliary injection
Anterior chamber cells and flare
Granulomatous inflammation
Mutton-fat keratic precipitates
Posterior synechiae
Elevated IOP
Visible lens fragments in some cases

Granulomatous Uveitis

Inflammation may be characterized by:

Large keratic precipitates
Iris nodules occasionally
Posterior synechiae
Significant anterior chamber cellular reaction

The inflammation may persist until the inciting lens material is removed.

Lens Material

Residual lens material may be found:

In the anterior chamber
In the capsular bag
Behind the iris
In the vitreous cavity

Posteriorly retained lens fragments can be difficult to visualize directly.

Posterior Segment Findings

If lens material has dropped posteriorly, there may be:

Vitritis
Retained nuclear fragment
Cystoid macular edema
Retinal edema
Reduced fundus view

Intraocular Pressure

IOP may range from mildly elevated to:

Severely elevated

Mechanisms include:

Trabecular inflammatory obstruction
Lens-particle obstruction
Peripheral anterior synechiae
Steroid response

Diagnostic Approach

The key questions are:

Is retained lens material present?
Is this sterile inflammation or infection?
What mechanism is causing the elevated IOP?
Is there posterior segment involvement?

Slit-Lamp Examination

Evaluate for:

Corneal edema
Keratic precipitates
Anterior chamber cell/flare
Hypopyon
Lens fragments
Posterior synechiae
Surgical wound integrity

Gonioscopy

When feasible, gonioscopy may demonstrate:

Lens material in the angle
Trabecular inflammatory debris
Peripheral anterior synechiae
Secondary angle closure

Dilated Fundus Examination

Assess for:

Dropped lens fragments
Vitritis
Retinal inflammation
Cystoid macular edema
Retinal tears or detachment after complicated surgery

B-Scan Ultrasonography

B-scan is useful when the posterior segment cannot be visualized because of:

Corneal edema
Severe inflammation
Media opacity

It may help identify:

Retained lens fragments
Vitreous opacities
Retinal detachment

Anterior Segment Imaging

UBM or AS-OCT may occasionally help detect:

Retained anterior lens material
Angle abnormalities
Capsular remnants

particularly when fragments are hidden behind the iris.

Aqueous or Vitreous Sampling

Sampling is not routinely required for classic sterile phacoantigenic inflammation.

It becomes important when:

Infectious endophthalmitis cannot be excluded.

Possible tests include:

Gram stain
Culture
PCR in selected cases

Histopathology

Classic histology demonstrates:

Polymorphonuclear leukocytes
Epithelioid histiocytes
Multinucleated giant cells

arranged around:

Lens material

This produces a zonal granulomatous inflammatory pattern.

Differential Diagnosis

Important differentials include:

Lens-particle glaucoma
Phacolytic glaucoma
Chronic postoperative endophthalmitis
Toxic anterior segment syndrome
Exacerbation of preexisting uveitis
Retained lens fragments without immune granulomatous reaction
Sympathetic ophthalmia
Uveitic glaucoma from another cause

Chronic Postoperative Endophthalmitis

One of the most important mimics is indolent infection, particularly from:

Cutibacterium acnes

formerly Propionibacterium acnes.

Clues include:

Recurrent inflammation after steroid taper
White plaque within the capsular bag
Vitritis
Chronic postoperative course

Infection must be excluded before assuming the process is purely immune-mediated.

Toxic Anterior Segment Syndrome

TASS usually presents:

Within approximately 12–48 hours after surgery
With diffuse limbus-to-limbus corneal edema
Marked anterior chamber inflammation
Minimal pain
No significant vitritis

It results from:

Sterile toxic injury, not lens-protein sensitization.

Phacolytic Glaucoma

Phacolytic glaucoma generally occurs in an eye with:

Mature or hypermature cataract
Intact-appearing capsule
High IOP
Anterior chamber inflammation

Macrophages and lens proteins obstruct the trabecular meshwork.

Definitive treatment is:

Cataract extraction

after initial IOP control.

Lens-Particle Glaucoma

Lens-particle glaucoma occurs when:

Lens fragments physically enter the anterior chamber

usually after:

Trauma
Cataract surgery

It may resemble phacoantigenic uveitis but is primarily a:

Mechanical-inflammatory trabecular obstruction

rather than a classic granulomatous immune response.

Treatment Principles

Management consists of:

Control inflammation.
Lower IOP.
Remove retained lens material.
Treat complications.

Definitive control often requires:

Removal of the inciting lens material.

Topical Corticosteroids

Topical corticosteroids are first-line for ocular inflammation.

Examples include:

Prednisolone acetate
Difluprednate in selected severe cases

Dosing depends on severity and may initially be frequent.

Steroids should subsequently be:

Tapered according to clinical response

after definitive treatment.

Cycloplegic Therapy

Cycloplegics may be useful when there is:

Significant ciliary spasm
Pain
Posterior synechiae

Examples include:

Cyclopentolate
Atropine in more severe disease

IOP-Lowering Therapy

Aqueous suppressants are generally preferred.

Options include:

Topical beta-blockers
Topical carbonic anhydrase inhibitors
Alpha-2 agonists
Oral acetazolamide when needed

Hyperosmotic Therapy

For severe acute IOP elevation, temporary treatment may include:

IV mannitol
Oral hyperosmotic agents in selected patients

This is generally a bridge to definitive treatment rather than long-term therapy.

Prostaglandin Analogs

Prostaglandin analogs may lower IOP but are often used cautiously during:

Active severe uveitis
Significant cystoid macular edema

They are not absolutely contraindicated in every inflammatory glaucoma but are often not the first choice during active postoperative inflammation.

Miotics

Miotics are generally avoided because they may:

Worsen inflammation
Promote posterior synechiae
Increase ciliary spasm

Surgical Removal of Lens Material

The definitive treatment is:

Removal of retained lens material when clinically significant.

The surgical approach depends on location.

Anterior Segment Lens Fragments

Fragments in the:

Anterior chamber
Capsular bag
Anterior vitreous

may be removed by an:

Anterior segment surgeon

using irrigation/aspiration or other appropriate techniques.

Posteriorly Retained Lens Fragments

Posteriorly displaced nuclear fragments usually require:

Pars plana vitrectomy

by a vitreoretinal surgeon.

Surgery may include:

Vitrectomy
Removal of lens fragments
Fragmatome-assisted removal for dense nuclear material

Timing of Vitrectomy

Timing depends on:

Fragment size
Degree of inflammation
IOP
Corneal edema
Macular status

Significant retained nuclear material with:

Severe inflammation
Uncontrolled IOP
Persistent corneal edema

generally favors timely vitreoretinal intervention.

Cystoid Macular Edema

CME may accompany chronic postoperative inflammation.

Treatment may include:

Topical corticosteroids
Topical NSAIDs
Periocular or intraocular corticosteroids in selected cases

after infection has been excluded.

Persistent Glaucoma

IOP may remain elevated after lens removal because of:

Trabecular damage
Peripheral anterior synechiae
Steroid response
Chronic uveitic glaucoma

Long-term glaucoma therapy may therefore be necessary.

Glaucoma Surgery

If IOP remains uncontrolled despite:

Lens removal
Control of inflammation
Maximal tolerated medical treatment

surgery may be required.

Options include:

Glaucoma drainage device
Trabeculectomy in selected eyes
Cyclophotocoagulation in refractory disease

In uveitic eyes, drainage devices are frequently important because filtration surgery may fail from inflammation and scarring.

Follow-Up

During active disease, follow-up should be:

Frequent

depending on:

IOP
Degree of inflammation
Corneal edema
Retained lens material
Response to therapy

Some patients require review every:

Day
Few days

until stable.

Long-Term Monitoring

After inflammation resolves, monitor for:

Persistent glaucoma
Peripheral anterior synechiae
Steroid-induced ocular hypertension
Cystoid macular edema
Optic nerve damage

Prognosis

Prognosis depends on:

Duration of inflammation
Magnitude of IOP elevation
Amount and location of retained lens material
Corneal damage
Macular involvement
Timing of definitive treatment

Prompt recognition and removal of significant retained material generally improves outcome.

Complications

Potential complications include:

Secondary glaucoma
Permanent optic nerve damage
Peripheral anterior synechiae
Posterior synechiae
Cystoid macular edema
Corneal edema
Chronic uveitis
Vitreous inflammation
Surgical complications from vitrectomy or glaucoma surgery

Ophthalmology Pearls

“Phacoanaphylactic glaucoma” is an older term; the preferred modern concept is phacoantigenic uveitis with secondary glaucoma.
It occurs after lens capsule disruption, most commonly from cataract surgery or trauma.
The inflammatory reaction is granulomatous and directed against exposed lens proteins, not a true anaphylactic reaction.
Think of it in a patient with persistent granulomatous uveitis and elevated IOP after complicated cataract surgery or lens trauma.
Retained lens fragments may be located in the anterior chamber or vitreous cavity.
Removal of clinically significant retained lens material is the definitive treatment.
Posteriorly dropped nuclear fragments usually require pars plana vitrectomy.
Use topical corticosteroids plus aqueous-suppressant glaucoma therapy while arranging definitive management.
Avoid routine miotics during active inflammation.
Always distinguish this disorder from chronic postoperative endophthalmitis, especially Cutibacterium acnes infection.
Also distinguish it from phacolytic glaucoma, in which the capsule is generally intact and hypermature lens proteins leak into the anterior chamber.
Persistent IOP elevation after inflammation resolves may reflect permanent trabecular damage or synechial angle closure and can require long-term glaucoma treatment or surgery.

Published on: September 20, 2026

Ophthalmology – Peters Anomaly

Ophthalmology – Peters Anomaly

Basics

Description

Peters anomaly is a congenital anterior segment dysgenesis characterized by a central or paracentral corneal opacity associated with focal absence or maldevelopment of:

Descemet membrane
Corneal endothelium

The posterior corneal defect may be associated with abnormal adherence of:

Iris to posterior cornea
Lens to posterior cornea

Disease may be:

Unilateral or bilateral
Isolated
Associated with other ocular abnormalities
Part of a multisystem genetic syndrome

The major threats to vision are:

Deprivation amblyopia
Glaucoma
Cataract
Associated posterior segment abnormalities

Pathophysiology

Peters anomaly results from abnormal development of the anterior segment during embryogenesis.

Proposed mechanisms include:

Abnormal neural crest migration or differentiation
Failure of normal lens–cornea separation
Abnormal development of posterior corneal structures

This results in:

Focal absence of endothelium
Focal absence of Descemet membrane
Corneal stromal opacity
Variable iridocorneal or lenticulocorneal adhesions

Epidemiology

Peters anomaly is:

Rare
Usually diagnosed at birth or early infancy
Variable in severity

Bilateral involvement is particularly important because it carries a greater risk of:

Severe visual deprivation
Genetic disease
Associated systemic abnormalities

Genetics

Most cases are sporadic, but both:

Autosomal dominant
Autosomal recessive

inheritance have been reported.

Associated genes include:

PAX6
FOXC1
PITX2
CYP1B1
FOXE3
PITX3
Other anterior segment developmental genes

Because these genes can produce overlapping phenotypes, Peters anomaly is best considered part of a broad:

Anterior segment dysgenesis spectrum

Peters Plus Syndrome

Peters plus syndrome is a syndromic disorder combining Peters anomaly with systemic developmental abnormalities.

Typical features include:

Short stature
Rhizomelic limb shortening
Brachydactyly
Characteristic craniofacial appearance
Developmental delay
Cleft lip and/or palate in some patients

It is caused by biallelic pathogenic variants in:

B3GLCT

formerly called B3GALTL.

Inheritance is:

Autosomal recessive

Other Systemic Associations

Peters anomaly may occur with:

CNS malformations
Developmental delay
Microcephaly
Seizures
Congenital heart disease
Renal/genitourinary abnormalities
Craniofacial anomalies
Skeletal abnormalities
Ear abnormalities

Systemic abnormalities are particularly important in:

Bilateral disease
Syndromic appearance
Multiple congenital anomalies

Ocular Associations

Associated ocular abnormalities include:

Glaucoma
Cataract
Microphthalmia
Microcornea
Iris hypoplasia
Corectopia
Polycoria
Iris coloboma
Aniridia-like abnormalities
Lens abnormalities
Ptosis

Posterior segment abnormalities may also occur.

Posterior Segment Associations

Possible findings include:

Optic nerve hypoplasia
Foveal hypoplasia
Retinal dysplasia
Chorioretinal coloboma
Persistent fetal vasculature
Posterior staphyloma
Macular developmental abnormalities

These can limit visual recovery even when the cornea is successfully cleared.

Glaucoma

Glaucoma is one of the most important complications.

Reported frequency is approximately:

30–70%

depending on case severity and series.

Mechanisms include:

Abnormal anterior chamber angle development
Trabecular dysgenesis
Secondary structural changes

Glaucoma may present:

At birth
During infancy
Later in childhood

Therefore:

Long-term glaucoma surveillance is mandatory.

Clinical Presentation

Typical presentation includes:

Congenital corneal opacity
Abnormal red reflex
Poor fixation
Nystagmus in bilateral severe cases
Strabismus
Leukocoria-like appearance

Corneal Appearance

The hallmark is:

Central or paracentral congenital corneal opacity

The opacity may be:

Small
Eccentric
Dense
Diffuse centrally
Unilateral or bilateral

Peripheral cornea may remain relatively clear.

Iris Adhesions

Iris strands may extend from the:

Iris collarette
Midperipheral iris

to the posterior surface of the opaque cornea.

These:

Iridocorneal adhesions

are a classic feature.

Lens Involvement

More severe disease may show:

Lens adherence to posterior cornea
Cataract
Lens malposition

Lens involvement generally indicates a more complex developmental abnormality.

Historical Classification

Type I Peters Anomaly

Traditionally characterized by:

Central/paracentral corneal opacity
Iridocorneal adhesions
No major lens adherence

Type II Peters Anomaly

Traditionally includes:

Lenticulocorneal adhesion
Often cataract
More extensive anterior segment dysgenesis

The Type I/II distinction remains useful descriptively but is now considered an oversimplification of a continuous developmental spectrum.

History

Important history includes:

Pregnancy and birth history
Family history
Consanguinity
Developmental milestones
Growth abnormalities
Other congenital malformations

Ask specifically about:

Poor visual behavior
Photophobia
Tearing
Eye enlargement
Corneal enlargement
Nystagmus
Strabismus

which may suggest associated glaucoma or severe visual deprivation.

Examination

Perform a complete pediatric ophthalmic examination including:

Age-appropriate visual assessment
Pupils
Ocular alignment
Motility
Corneal diameter
Corneal opacity location and density
Anterior chamber depth
Iris anatomy
Lens status
IOP
Cycloplegic refraction when possible
Posterior segment examination when visible

Examination Under Anesthesia

Examination under anesthesia may be required in infants to assess:

IOP
Corneal diameter
Angle anatomy
Lens
Axial length
Optic nerve
Posterior segment

It is often necessary for treatment planning.

Anterior Segment OCT

AS-OCT can demonstrate:

Posterior corneal defect
Iridocorneal adhesion
Lenticulocorneal adhesion
Anterior chamber configuration

It is useful when sufficient corneal transparency exists.

Ultrasound Biomicroscopy

UBM is particularly valuable for evaluating:

Iris
Ciliary body
Angle
Lens position
Posterior corneal adhesions

especially when direct visualization is limited.

B-Scan Ultrasonography

When the posterior segment cannot be visualized, B-scan may assess:

Retina
Vitreous
Optic nerve region
Retinal detachment
Major posterior structural abnormalities

Systemic Evaluation

Further testing should be guided by clinical findings.

Depending on phenotype, consider:

Clinical genetics
Developmental assessment
Echocardiography
Renal ultrasound
Neuroimaging
Skeletal evaluation

Genetic Testing

Genetic testing is particularly appropriate for:

Bilateral Peters anomaly
Family history
Peters plus phenotype
Developmental delay
Multiple congenital abnormalities

Testing may include:

Targeted anterior segment dysgenesis panel
Chromosomal microarray
Exome/genome sequencing in selected patients

Differential Diagnosis

Important causes of congenital corneal opacity include:

Congenital glaucoma
Sclerocornea
Congenital hereditary endothelial dystrophy
Corneal dermoid
Birth trauma / forceps injury
Intrauterine keratitis
Metabolic storage disorders
Congenital infection
Ocular trauma

Peters Anomaly vs Congenital Glaucoma

Peters Anomaly

Usually shows:

Focal central opacity
Posterior corneal defect
Iris/lens adhesions
Anterior segment dysgenesis

Congenital Glaucoma

More often shows:

Enlarged corneal diameter
Buphthalmos
Diffuse corneal edema
Haab striae
Elevated IOP

The two disorders can coexist.

Peters Anomaly vs Sclerocornea

Peters Anomaly

Central or paracentral opacity
Posterior corneal defect
Iridocorneal or lenticulocorneal adhesions

Sclerocornea

Peripheral or diffuse scleralization of cornea
Poorly defined limbus
Often bilateral
No characteristic focal posterior corneal defect

Peters Anomaly vs Birth Trauma

Forceps injury may cause:

Corneal edema
Linear Descemet tears
Characteristic vertical or oblique breaks

A clear history of birth trauma and absence of congenital anterior segment dysgenesis favor traumatic injury.

Treatment Goals

Management aims to:

Establish a useful visual axis.
Prevent severe amblyopia.
Treat glaucoma.
Correct refractive error.
Manage cataract or other structural abnormalities.

Treatment must be individualized.

Observation

Observation may be appropriate when:

Corneal opacity is small
Opacity is eccentric
Visual axis remains sufficiently clear
Fixation is good
There is no significant glaucoma

Some small opacities become functionally less significant as the eye grows.

Optical Iridectomy

Optical iridectomy can be useful when:

Central cornea is opaque
Peripheral cornea is clear
Lens is sufficiently transparent

A sector iridectomy creates an alternative visual axis through clear peripheral cornea.

Advantages include avoiding:

Corneal graft rejection
Graft failure
Intensive graft surveillance

Penetrating Keratoplasty

Penetrating keratoplasty may be considered for:

Dense bilateral central opacity
Severe visual-axis obstruction
Significant deprivation amblyopia risk

The decision is complex because infant corneal grafting has:

High rejection risk
High graft failure rate
Frequent glaucoma
Suture-related complications
Need for repeated examinations under anesthesia

Timing of Keratoplasty

Early surgery may improve amblyopia potential but increases technical and postoperative difficulty.

Delayed surgery may:

Improve surgical ease
Reduce some graft-related risks

but may allow irreversible:

Deprivation amblyopia

Therefore timing is individualized according to:

Laterality
Opacity density
Visual behavior
Associated abnormalities

Pediatric Graft Prognosis

Long-term graft survival is substantially poorer than routine adult keratoplasty.

Even with a clear graft, visual outcome may remain limited by:

Amblyopia
Glaucoma
Cataract
Optic nerve hypoplasia
Retinal abnormalities

Endothelial Keratoplasty

Procedures such as DMEK or DSAEK are generally not standard primary treatment for classic Peters anomaly because the disorder involves structural developmental defects beyond isolated endothelial dysfunction.

Glaucoma Treatment

Medical therapy may include:

Topical beta blockers
Carbonic anhydrase inhibitors
Other age-appropriate agents

Medical therapy alone is frequently insufficient.

Glaucoma Surgery

Surgical options include:

Trabeculotomy
Goniotomy in selected eyes
Trabeculectomy
Glaucoma drainage devices

Angle surgery may be difficult because of:

Severe developmental angle abnormalities
Poor visualization
Abnormal anatomy

Glaucoma drainage devices are often important in refractory disease.

Cyclodestructive Procedures

Cyclophotocoagulation is generally reserved for:

Refractory glaucoma
Poor visual potential
Eyes in which other surgery has failed

Cataract Surgery

Lensectomy may be required for:

Significant cataract
Lenticulocorneal adhesion
Lens displacement
Visual-axis obstruction

Vitrectomy may also be required depending on associated anatomy.

Amblyopia Therapy

Amblyopia treatment is essential.

Management may include:

Refractive correction
Contact lens
Spectacles
Patching
Atropine penalization in selected cases

A technically successful corneal procedure may still produce poor vision if amblyopia is not treated aggressively.

Refractive Error

Children may develop substantial:

Astigmatism
Anisometropia
High refractive error

especially after:

Keratoplasty
Cataract surgery

Repeat cycloplegic refraction is therefore essential.

Low-Vision Rehabilitation

Children with severe bilateral visual impairment should receive early:

Low-vision services
Developmental intervention
Educational support
Orientation and mobility services when needed

Follow-Up

Long-term surveillance should include:

Visual acuity
Fixation behavior
Amblyopia
Refraction
Corneal clarity
Graft status
IOP
Optic nerve
Lens
Posterior segment

Glaucoma Monitoring

Because glaucoma may develop later:

Surveillance should continue throughout childhood and beyond.

Young children may require repeated EUA when reliable office IOP assessment is impossible.

Prognosis

Visual prognosis is highly variable.

More favorable features include:

Small or eccentric opacity
Unilateral mild disease
Clear peripheral cornea
Normal lens
No glaucoma
Normal posterior segment

Poor Prognostic Features

Include:

Dense bilateral central opacity
Severe glaucoma
Lens involvement
Microphthalmia
Optic nerve hypoplasia
Retinal dysplasia
Delayed visual rehabilitation

Systemic Prognosis

Systemic prognosis depends on associated abnormalities.

Children with isolated unilateral disease may otherwise be entirely healthy.

Patients with:

Peters plus syndrome
CNS abnormalities
Multisystem congenital disease

require multidisciplinary follow-up.

Complications

Major complications include:

Amblyopia
Glaucoma
Cataract
Corneal graft rejection
Graft failure
Irregular astigmatism
Anisometropia
Strabismus
Permanent visual impairment

Ophthalmology Pearls

Peters anomaly is a congenital central or paracentral corneal opacity caused by posterior corneal dysgenesis involving Descemet membrane and endothelium.
Classic associated findings are iridocorneal adhesions and, in more severe cases, lenticulocorneal adhesion with cataract.
It belongs to the broader spectrum of anterior segment dysgenesis.
Glaucoma is common, potentially severe, and may develop later, so lifelong surveillance is essential.
The historical Type I/Type II classification is useful descriptively but does not capture the full phenotypic spectrum.
Bilateral Peters anomaly should prompt consideration of genetic and systemic evaluation.
Peters plus syndrome is caused by biallelic B3GLCT variants and is associated with short stature, skeletal abnormalities, craniofacial features, and developmental delay.
AS-OCT and UBM help define the relationship among the cornea, iris, angle, and lens.
Optical iridectomy can sometimes avoid penetrating keratoplasty when a clear peripheral corneal window is available.
Pediatric keratoplasty is challenging because of graft rejection, glaucoma, suture complications, and amblyopia.
A clear corneal graft does not guarantee good vision; final outcome is often determined by amblyopia, glaucoma, lens status, optic nerve development, and retinal anatomy.

Published on: September 20, 2026

Ophthalmology – Persistent Hyperplastic Primary Vitreous / Persistent Fetal Vasculature

Ophthalmology – Persistent Hyperplastic Primary Vitreous / Persistent Fetal Vasculature

Basics

Description

Persistent fetal vasculature (PFV) is a congenital developmental ocular disorder caused by incomplete regression of the fetal:

Hyaloid vascular system
Primary vitreous
Tunica vasculosa lentis

The older term persistent hyperplastic primary vitreous (PHPV) is now largely historical. PFV is preferred because the disorder may affect multiple structures beyond the primary vitreous, including the:

Lens
Ciliary body
Retina
Optic nerve
Anterior chamber angle

PFV is usually:

Unilateral
Sporadic
Present from birth
Associated with a smaller affected eye

Severity ranges from a subtle persistent fetal remnant to severe retinal dysplasia and detachment.

Classification

PFV is classified as:

Anterior PFV
Posterior PFV
Combined PFV

Combined anterior-posterior disease is common.

Anterior PFV

Anterior abnormalities may include:

Persistent tunica vasculosa lentis
Retrolental fibrovascular membrane
Posterior lens plaque
Cataract
Elongated or centrally dragged ciliary processes
Shallow anterior chamber
Lens displacement
Secondary angle closure
Microcornea

Posterior PFV

Posterior disease may demonstrate:

Persistent hyaloid artery
Fibrovascular stalk from optic disc toward lens
Bergmeister papilla
Vitreous membranes
Retinal fold
Macular traction
Retinal dysplasia
Tractional retinal detachment
Optic nerve hypoplasia or dysplasia

Embryology

The fetal hyaloid circulation supplies the developing lens and primary vitreous.

It normally undergoes regression before birth.

Normal remnants may include:

Mittendorf dot on the posterior lens capsule
Bergmeister papilla at the optic disc
Occasionally a persistent hyaloid artery

PFV represents more extensive persistence with secondary fibrovascular contraction.

Pathophysiology

Failure of fetal vascular regression leaves:

Persistent vessels
Fibrous tissue
Primary vitreous

Contraction of this tissue may pull on the:

Lens
Ciliary body
Retina
Optic disc

producing progressive structural distortion.

Epidemiology

PFV is uncommon.

The majority of cases are:

Unilateral and sporadic

Bilateral disease is unusual and should prompt consideration of an:

Inherited retinal disorder
Syndromic developmental disorder

Genetics

Most isolated PFV has no identifiable inherited cause.

Rare PFV or PFV-like phenotypes have been associated with genes including:

ATOH7
NDP
FZD4
LRP5
TSPAN12
PAX6

Genetic evaluation becomes particularly important in:

Bilateral disease
Familial disease
Severe retinal dysplasia
Systemic congenital abnormalities

Bilateral PFV – Important Principle

True bilateral isolated PFV is uncommon.

When both eyes show severe fibrovascular retinal abnormalities, consider:

Norrie disease / NDP-related retinopathy
Familial exudative vitreoretinopathy
Retinopathy of prematurity
Incontinentia pigmenti
Walker-Warburg spectrum
Other retinal dysplasia syndromes

NDP-Related Retinopathy

NDP-related disease may produce a severe congenital retinal phenotype resembling PFV.

The most severe form is:

Norrie disease

Typical features include:

Bilateral retinal dysplasia
Retinal detachment
Pseudoglioma
Severe congenital visual impairment

Associated systemic manifestations may include:

Progressive sensorineural hearing loss
Developmental or behavioral abnormalities

Familial Exudative Vitreoretinopathy

FEVR may produce:

Peripheral avascular retina
Neovascularization
Fibrosis
Retinal folds
Tractional retinal detachment

It may be profoundly asymmetric, but bilateral peripheral vascular abnormalities often support FEVR over classic unilateral PFV.

Clinical Presentation

The classic presentation is:

Leukocoria in an infant with a microphthalmic eye

Ophthalmology – Persistent Fetal Vasculature (PFV)

Ophthalmology – Persistent Fetal Vasculature (PFV)

Basics

Description

Persistent fetal vasculature (PFV) is a congenital developmental disorder caused by incomplete regression of the:

Primary vitreous
Hyaloid vascular system
Tunica vasculosa lentis

The older term:

Persistent hyperplastic primary vitreous (PHPV)

has largely been replaced by PFV, because the abnormality may involve more than the primary vitreous alone.

PFV is usually:

Unilateral
Sporadic
Associated with a smaller affected eye

It may cause:

Leukocoria
Cataract
Retrolental fibrovascular tissue
Retinal traction
Retinal detachment
Microphthalmia

Clinical Importance

The most important diagnostic issue is:

PFV must be distinguished from retinoblastoma.

Both may present in infancy with:

Leukocoria
Retrolental opacity
Poor vision

Misdiagnosis can have major consequences.

Classification

PFV is divided into:

Anterior PFV
Posterior PFV
Combined PFV

Combined disease is common.

Anterior PFV

Anterior findings may include:

Retrolental fibrovascular membrane
Posterior lens plaque
Cataract
Elongated ciliary processes
Persistent tunica vasculosa lentis
Shallow anterior chamber
Microphthalmia

The retrolental membrane may exert traction on the:

Ciliary processes
Lens
Iris

Posterior PFV

Posterior findings may include:

Fibrovascular stalk from optic disc toward posterior lens
Optic nerve hypoplasia
Retinal folds
Macular traction
Retinal dysplasia
Tractional retinal detachment
Vitreous hemorrhage

Combined PFV

Combined PFV contains both:

Anterior segment changes
Posterior segment tractional abnormalities

Visual prognosis is generally worse than in isolated anterior PFV.

Epidemiology

PFV is rare.

Most cases are:

Unilateral
Sporadic

Bilateral disease is uncommon and should raise suspicion for:

Genetic disease
Syndromic retinal dysplasia
Another diagnosis mimicking PFV

Embryology

The fetal hyaloid vascular system supplies the developing:

Lens
Primary vitreous

during early gestation.

It normally regresses before birth.

Remnants of this system can persist physiologically as:

Mittendorf dot on the posterior lens capsule
Bergmeister papilla at the optic disc
Persistent hyaloid artery

PFV represents a much more extensive failure of involution.

Pathophysiology

Failure of normal fetal vascular regression produces persistent:

Fibrovascular tissue
Hyaloid vessels
Primary vitreous

Subsequent contraction may cause:

Lens distortion
Ciliary process elongation
Retinal traction
Retinal folds
Retinal detachment

Genetics

Most PFV is:

Sporadic

Rare familial and syndromic forms have been described.

Genes associated with PFV or PFV-like phenotypes include:

ATOH7
NDP
FZD4
LRP5
PAX6

depending on phenotype.

Genetic evaluation is particularly appropriate when PFV is:

Bilateral
Associated with retinal dysplasia
Accompanied by systemic abnormalities
Present in multiple family members

Bilateral PFV

True bilateral PFV is unusual.

The differential should include:

Norrie disease
Familial exudative vitreoretinopathy
Retinopathy of prematurity
Incontinentia pigmenti
Walker-Warburg spectrum
Other developmental retinal disorders

Clinical Presentation

The classic presentation is:

Unilateral leukocoria in an infant with microphthalmia

Ophthalmology – Peripheral Corneal Ulcers / Peripheral Ulcerative Keratitis

Ophthalmology – Peripheral Corneal Ulcers / Peripheral Ulcerative Keratitis

Basics

Description

Peripheral ulcerative keratitis (PUK) is a potentially vision- and globe-threatening inflammatory disorder characterized by:

Peripheral corneal epithelial defect
Stromal inflammation
Progressive stromal thinning or “melting”

It occurs within the peripheral cornea adjacent to the limbus, where the cornea is exposed to:

Limbal blood vessels
Immune complexes
Complement
Inflammatory cells

PUK may be:

Immune-mediated
Infectious
Postoperative or post-traumatic

The most clinically important form is immune-mediated PUK associated with systemic vasculitis.

Clinical Importance

PUK can progress rapidly to:

Severe stromal thinning
Descemetocele
Corneal perforation
Permanent visual loss

When associated with systemic vasculitis, it may also signal:

Potentially life-threatening systemic disease

Therefore severe or progressive PUK requires urgent:

Corneal evaluation
Infectious exclusion
Systemic investigation
Rheumatologic collaboration

Peripheral Cornea and Immunology

The peripheral cornea is particularly susceptible to immune injury because of its proximity to the:

Limbal vascular arcade

Immune complexes and inflammatory mediators can enter the peripheral cornea and activate:

Complement
Neutrophils
Macrophages
Matrix metalloproteinases

leading to:

Collagen degradation and stromal melt

Etiology

Immune-Mediated

Important causes include:

Rheumatoid arthritis
Granulomatosis with polyangiitis (GPA)
Polyarteritis nodosa
Systemic lupus erythematosus
Relapsing polychondritis
Inflammatory bowel disease
Other systemic vasculitides

Rheumatoid Arthritis

RA is one of the most common systemic associations.

PUK often occurs in patients with:

Long-standing
Seropositive
Severe systemic disease

However:

Ocular severity does not necessarily parallel joint activity.

A patient with apparently quiet arthritis may still develop severe corneal vasculitis.

Granulomatosis With Polyangiitis

Formerly called:

Wegener granulomatosis

GPA-associated PUK may occur with:

Necrotizing scleritis
Orbital inflammation
Pulmonary disease
Renal disease

This combination should be treated as a systemic vasculitic emergency.

Infectious Peripheral Ulceration

Infectious keratitis must always be excluded.

Potential organisms include:

Bacterial

Staphylococcus
Streptococcus
Pseudomonas
Moraxella
Neisseria gonorrhoeae

Fungal

Fusarium
Aspergillus
Candida
Other fungi depending on exposure

Viral

Herpes simplex
Herpes zoster

Important Principle

Do not assume that a peripheral ulcer in a patient with rheumatoid arthritis is sterile.

Immune-mediated patients may simultaneously develop:

Bacterial keratitis
HSV keratitis
Fungal infection

particularly if they are immunosuppressed.

Risk Factors

Important risk factors include:

Rheumatoid arthritis
Systemic vasculitis
Autoimmune disease
Previous ocular surgery
Trauma
Severe dry eye
Exposure keratopathy
Lagophthalmos
Immunosuppression
Contact lens use
Ocular surface disease

Postoperative PUK

PUK may occur after ocular surgery, including:

Cataract surgery
Corneal surgery
Scleral surgery

In predisposed patients, surgery may trigger:

Aberrant immune activation against corneal antigens

Pathophysiology

Immune-mediated disease involves:

Immune complex deposition around limbal vessels
Complement activation
Recruitment of inflammatory cells
Release of proteases and collagenases
Stromal collagen destruction
Progressive corneal thinning

Matrix metalloproteinases contribute substantially to:

Corneal melting

Association With Scleritis

PUK may occur with:

Necrotizing anterior scleritis

This strongly suggests:

Severe systemic autoimmune disease
Systemic vasculitis

and generally requires aggressive systemic immunosuppression.

History

Patients commonly present with:

Red eye
Severe pain
Photophobia
Tearing
Foreign-body sensation
Reduced vision

Pain may be particularly severe when:

Scleritis accompanies PUK

Systemic History

Ask about:

Rheumatoid arthritis
Sinus disease
Hemoptysis
Cough
Dyspnea
Hematuria
Renal disease
Skin rash
Joint pain
Oral ulcers
Neurologic symptoms

These may indicate systemic vasculitis.

Infectious History

Ask about:

Trauma
Vegetable matter injury
Contact lens use
Recent ocular surgery
Lagophthalmos
Hospitalization
Immunosuppression
Previous HSV or HZO

Physical Examination

Typical PUK demonstrates:

Peripheral epithelial defect
Adjacent stromal infiltrate
Stromal thinning
Limbal inflammation

The lesion may extend:

Circumferentially
Centrally

Corneal Melt

Progressive stromal destruction may produce:

Marked thinning
Descemetocele
Microperforation
Frank perforation

The central edge may appear:

Undermined
Steep
Actively melting

Corneal Epithelial Defect

True PUK generally has an:

Overlying epithelial defect

If the epithelium remains intact, consider alternative diagnoses such as:

Marginal keratitis
Peripheral stromal inflammation

rather than classic ulcerative keratitis.

Associated Scleritis

Look carefully for:

Deep scleral injection
Violaceous hue
Severe tenderness
Areas of scleral necrosis

Necrotizing scleritis with PUK is particularly concerning for systemic vasculitis.

Infectious Keratitis Findings

Features suggesting infection include:

Dense focal stromal infiltrate
Purulent discharge
Significant anterior chamber reaction
Hypopyon
Rapid progression
Satellite lesions in fungal disease
Contact lens or trauma history

Herpetic Peripheral Keratitis

HSV or HZO may produce:

Peripheral epithelial disease
Stromal infiltrates
Corneal thinning
Reduced corneal sensation

However, corneal hypoesthesia may not always be obvious.

Herpetic disease must be excluded before escalating immunosuppression.

Gonococcal Keratitis

Neisseria gonorrhoeae can penetrate intact corneal epithelium and cause:

Rapid stromal destruction
Hyperpurulent discharge
Perforation

This is an ophthalmic emergency requiring:

Immediate systemic and topical antimicrobial treatment

Diagnostic Approach

The main diagnostic questions are:

Is this infectious or sterile?
Is there associated scleritis?
Is there underlying systemic vasculitis?
Is the cornea at risk of perforation?

Corneal Scraping

Perform corneal scraping when there is:

Epithelial defect with infiltrate
Significant suppuration
Rapid progression
Atypical appearance
Immunosuppression
Concern for bacterial or fungal infection

Tests may include:

Gram stain
Culture
Fungal stain/culture

HSV Testing

HSV PCR may be useful when:

Clinical suspicion is high
Presentation is atypical
Diagnosis remains uncertain

It is not routinely required for classic cases.

Systemic Laboratory Evaluation

In unexplained or suspected immune-mediated PUK, consider:

CBC
ESR
CRP
Renal function
Urinalysis

Autoimmune testing may include:

Rheumatoid factor
Anti-CCP antibodies
ANCA
PR3-ANCA
MPO-ANCA
ANA
Complement levels when indicated

Infectious Screening Before Immunosuppression

Depending on context and planned therapy, consider:

Syphilis serology
Tuberculosis screening
Hepatitis B
Hepatitis C
HIV

especially before major systemic immunosuppression or biologic therapy.

Urinalysis

Urinalysis is particularly important when GPA is suspected.

Look for:

Hematuria
Proteinuria
Cellular casts

which may indicate:

Glomerulonephritis

Chest Imaging

Chest radiography or CT may be appropriate when there is concern for:

GPA
Sarcoidosis
Tuberculosis
Systemic vasculitis

Biopsy

Systemic tissue biopsy may occasionally be required to establish:

GPA
Other vasculitic disease

Potential sites include:

Kidney
Lung
Upper respiratory tract

depending on clinical disease.

Anterior Segment OCT

AS-OCT is useful for documenting:

Location of thinning
Residual stromal thickness
Progression
Response to treatment

It is particularly helpful in severe or impending perforation.

Differential Diagnosis

Important differentials include:

Infectious keratitis
Marginal keratitis
Mooren ulcer
Terrien marginal degeneration
Pellucid marginal degeneration
Dellen
Neurotrophic keratopathy
Exposure keratopathy
HSV/HZO keratitis

Mooren Ulcer

Mooren ulcer is a painful progressive peripheral ulcerative keratitis occurring:

Without associated scleritis
Without identifiable systemic vasculitic disease
After infectious and systemic causes have been excluded

It is therefore largely a:

Diagnosis of exclusion

Mooren Ulcer Features

Typical findings include:

Severe pain
Peripheral crescentic ulcer
Undermined central edge
Circumferential progression
Later central progression

Scleral involvement argues against classic Mooren ulcer.

Marginal Keratitis

Staphylococcal marginal keratitis usually shows:

Peripheral infiltrates
Clear interval between infiltrate and limbus
Associated blepharitis

It is generally less destructive than PUK.

Terrien Marginal Degeneration

Terrien degeneration is usually:

Painless
Noninflammatory
Slowly progressive

with:

Peripheral thinning
Lipid deposition
Intact epithelium

This contrasts with painful inflammatory PUK.

Treatment Principles

Management has three simultaneous goals:

Exclude and treat infection
Suppress destructive inflammation
Preserve globe integrity

Immune-Mediated PUK

Severe immune-mediated PUK generally requires:

Systemic immunosuppression

Topical treatment alone is insufficient.

Systemic Corticosteroids

High-dose systemic corticosteroids may be used for rapid control of severe inflammation.

However:

Steroids are usually a bridge rather than definitive long-term therapy

because steroid-sparing immunosuppression is often required.

Immunosuppressive Therapy

Treatment depends on the underlying systemic disorder.

Agents may include:

Methotrexate
Mycophenolate mofetil
Azathioprine
Cyclophosphamide
Rituximab

GPA-Associated PUK

Severe GPA-related ocular disease may require induction therapy with:

Rituximab
Cyclophosphamide

usually combined initially with systemic corticosteroids.

Management should be coordinated urgently with:

Rheumatology

Rheumatoid Arthritis-Associated PUK

Systemic treatment may involve:

Methotrexate
Mycophenolate
Biologic therapy
Rituximab
Other disease-modifying agents

depending on systemic disease and severity.

Biologic Therapy

Refractory disease may respond to biologic agents such as:

Rituximab
Anti-TNF therapy in selected conditions

Choice depends on:

Underlying systemic disease
Previous treatment
Infectious risk

Topical Corticosteroids

Topical corticosteroids require caution.

They may reduce inflammation but can also:

Delay epithelial healing
Promote collagenolysis
Worsen undiagnosed infection

Therefore:

Do not use topical steroids indiscriminately in an actively melting peripheral ulcer.

They may be considered after infection is excluded and systemic inflammation is being appropriately treated.

Topical Lubrication

Use aggressive ocular-surface support with:

Preservative-free artificial tears
Lubricating ointment

Treat associated:

Dry eye
Exposure
Blepharitis

Oral Doxycycline

Doxycycline may be used as an adjunct because it inhibits:

Matrix metalloproteinases

and may reduce corneal collagenolysis.

It is not being used primarily for its antimicrobial effect in sterile PUK.

Vitamin C

Oral vitamin C may be used as an adjunct because it supports:

Collagen synthesis
Stromal healing

It is supportive rather than definitive therapy.

Infectious Bacterial Ulcer

Treatment may include:

Intensive topical fluoroquinolone
Fortified antibiotics for severe disease

Choice depends on:

Size
Depth
Location
Gram stain
Culture

Fungal Keratitis

Treatment depends on organism.

Common options include:

Natamycin for filamentous fungi
Amphotericin B for selected yeasts
Voriconazole in selected cases

Treatment should be culture-guided when possible.

Herpetic Disease

HSV or HZO may require:

Systemic antiviral therapy
Topical antiviral therapy in appropriate epithelial HSV disease

Topical steroids should only be used in selected stromal disease under:

Antiviral cover

Corneal Perforation

Impending or actual perforation is an emergency.

Treatment depends on:

Size
Location
Activity of inflammation
Presence of infection

Cyanoacrylate Tissue Adhesive

For small focal perforations, cyanoacrylate glue may provide:

Temporary tectonic support

often with a bandage contact lens placed over the glue.

Bandage Contact Lens

A bandage lens may help protect:

Tissue adhesive
Small epithelial defects

However, caution is required in active infection because contact lenses may increase microbial risk.

Lamellar Keratoplasty

Peripheral lamellar or patch grafting may be required for:

Severe thinning
Larger peripheral perforation
Failure of tissue adhesive

Penetrating Keratoplasty

Full-thickness grafting may be required for:

Large perforation
Central involvement
Extensive structural failure

Outcomes are poorer when surgery is performed during:

Active uncontrolled inflammation

so systemic disease control remains critical.

Conjunctival Resection

Adjacent conjunctival resection was historically used to reduce delivery of:

Inflammatory cells
Immune complexes

to the peripheral cornea.

It now has a much more limited role because modern systemic immunosuppression and other therapies are generally preferred.

Tarsorrhaphy

Partial tarsorrhaphy may be useful when significant:

Lagophthalmos
Exposure keratopathy

contributes to peripheral thinning.

Dry Eye Management

Treat aggressively with:

Preservative-free lubrication
Ointment
Punctal occlusion in selected patients
Moisture protection
Eyelid closure procedures when needed

Follow-Up

Active PUK may require examination:

Daily or every few days

depending on severity.

Monitor:

Epithelial defect size
Stromal thinning
Infiltrate
Anterior chamber inflammation
Scleritis
Signs of impending perforation

Rheumatologic Follow-Up

Immune-mediated disease requires close co-management with:

Rheumatology
Internal medicine

because controlling systemic vasculitis may:

Preserve the eye
Reduce systemic morbidity
Improve survival

Prognosis

Prognosis depends on:

Cause
Speed of diagnosis
Degree of stromal thinning
Scleral involvement
Infection
Systemic disease control

Early aggressive therapy can preserve:

Globe integrity
Useful vision

Visual Loss

Vision may be reduced by:

Corneal scarring
Irregular astigmatism
Central extension
Perforation
Surgical graft complications

Complications

Major complications include:

Corneal melt
Descemetocele
Corneal perforation
Severe scarring
Irregular astigmatism
Secondary infection
Recurrent ulceration
Necrotizing scleritis
Permanent visual loss

Ophthalmology Pearls

PUK is a peripheral corneal epithelial defect with stromal inflammation and progressive thinning.
Always distinguish infectious keratitis from immune-mediated PUK before escalating corticosteroids or systemic immunosuppression.
The strongest systemic associations include rheumatoid arthritis and granulomatosis with polyangiitis.
PUK plus necrotizing scleritis should raise major concern for severe systemic vasculitis.
Ocular PUK may be severe even when the patient’s systemic autoimmune disease appears clinically quiet.
Urinalysis, renal function, ANCA, RF/anti-CCP, and inflammatory markers are important when systemic vasculitis is suspected.
True PUK usually has an epithelial defect; peripheral stromal inflammation with intact epithelium should broaden the differential.
Mooren ulcer is a diagnosis of exclusion and classically lacks associated scleritis or systemic vasculitis.
Systemic immunosuppression is the cornerstone of treatment for severe autoimmune PUK; topical therapy alone is inadequate.
Rituximab or cyclophosphamide may be required for severe GPA-associated disease.
Oral doxycycline can be useful as an adjunct because of its anti-collagenase/MMP-inhibiting effect.
Small perforations may be managed temporarily with cyanoacrylate glue, while larger defects may require tectonic keratoplasty.
Peripheral ulcerative keratitis can be a marker of life-threatening systemic vasculitis, so treatment may improve not only vision but overall survival.

Published on: September 20, 2026

Ophthalmology – Periocular Infantile Hemangioma

Ophthalmology – Periocular Infantile Hemangioma

Basics

Description

Infantile hemangioma (IH) is the preferred term for the lesion historically called:

Capillary hemangioma
Strawberry hemangioma
Strawberry nevus

It is a benign vascular tumor of infancy characterized by:

Rapid postnatal endothelial proliferation
Plateau phase
Gradual spontaneous involution

Periocular IH may involve:

Eyelid skin
Subcutaneous tissues
Orbit
Conjunctiva
Combination of superficial and deep tissues

The major ophthalmic concern is:

Amblyopia during the critical period of visual development.

Classification

Infantile hemangiomas are commonly classified as:

Superficial
Deep
Combined

They may also be:

Focal/localized
Segmental
Multifocal

Segmental facial lesions are particularly important because of their association with:

PHACE syndrome

Superficial Infantile Hemangioma

Typically appears as:

Bright red
Lobulated
Raised
Compressible

The classic appearance is often described as:

“Strawberry” hemangioma

Deep Infantile Hemangioma

Deep lesions involve:

Subcutaneous tissue
Orbit

They often appear:

Bluish-purple
Poorly defined externally
Soft and compressible

Deep orbital lesions may cause:

Proptosis
Globe displacement
Ptosis
Astigmatism
Strabismus

Epidemiology

Infantile hemangioma is the:

Most common benign vascular tumor of infancy

It occurs more frequently in:

Girls
Premature infants
Low-birth-weight infants
Multiple gestations

Periocular lesions represent a smaller subset of all infantile hemangiomas.

Risk Factors

Reported risk factors include:

Prematurity
Low birth weight
Female sex
Multiple gestation
Advanced maternal age
Placental abnormalities or procedures in some studies

Most cases are:

Sporadic

Pathophysiology

Infantile hemangioma is a true vascular tumor rather than a vascular malformation.

It demonstrates:

Endothelial cell proliferation
Increased angiogenic signaling
Characteristic involution with maturation

Unlike vascular malformations, IH has a:

Proliferative phase followed by spontaneous regression.

Placental Hypothesis

Infantile hemangioma and placental microvasculature share several markers, leading to hypotheses involving:

Placental-like endothelial cells
Embolized placental cells
Shared developmental pathways

However, a direct placental “metastasis” mechanism has not been definitively established.

Pathology

Histology demonstrates:

Lobular proliferation of capillary-sized vessels
Benign endothelial cells
Closely packed vascular channels

A characteristic immunohistochemical marker is:

GLUT1 positivity

GLUT1 is useful in distinguishing infantile hemangioma from many vascular malformations.

Natural History

Most infantile hemangiomas are:

Absent or subtle at birth
Apparent within the first several weeks of life

Growth is most rapid during:

The first few months of life

Most proliferative growth occurs by approximately:

5 months of age

although deeper lesions may continue enlarging somewhat longer.

Involution

After the proliferative phase:

Growth stabilizes
Involution begins gradually

Regression occurs over:

Several years

Residual changes may include:

Telangiectatic vessels
Fibrofatty tissue
Skin redundancy
Pigmentary change
Scarring after ulceration

Ophthalmic Importance

Periocular IH is particularly important because it can interfere with visual development.

Major visual complications include:

Amblyopia
Astigmatism
Anisometropia
Visual-axis occlusion
Ptosis
Strabismus

Amblyopia

Amblyopia may be:

Deprivation Amblyopia

From:

Ptosis
Eyelid mass blocking the pupil

Anisometropic / Astigmatic Amblyopia

From mechanical pressure on the globe causing:

Corneal astigmatism
Refractive asymmetry

Strabismic Amblyopia

From:

Globe displacement
Extraocular muscle involvement

Astigmatism

Mechanical pressure from an upper-eyelid or orbital lesion may deform the cornea and induce:

Astigmatism
Anisometropia

This may persist even after the hemangioma involutes.

Therefore:

Cycloplegic refraction is essential in periocular IH.

Strabismus

Strabismus may develop from:

Globe displacement
Motility restriction
Visual deprivation
Anisometropia

Proptosis

Deep orbital hemangiomas may cause:

Axial or nonaxial proptosis
Exposure keratopathy
Optic nerve compression in severe cases

Clinical History

Parents often report:

Small pink or red mark appearing shortly after birth
Rapid enlargement over weeks
Progressive eyelid swelling
Partial occlusion of the eye

Deep lesions may present primarily with:

Proptosis
Bluish eyelid swelling

Examination

A complete pediatric ophthalmic examination should assess:

Fixation behavior
Age-appropriate visual acuity
Pupils
Ocular alignment
Motility
Degree of ptosis
Pupillary occlusion
Proptosis
Corneal exposure
Cycloplegic refraction
Dilated fundus examination

Typical Lesion Appearance

Superficial lesions:

Bright red
Raised
Lobulated
Blanch partially with pressure

Deep lesions:

Blue-purple
Subcutaneous
Compressible

Lesions may become more prominent with:

Crying
Dependent positioning
Valsalva-like maneuvers

PHACE Syndrome

Large segmental facial hemangiomas, particularly involving the upper face, may be associated with:

PHACE syndrome

The acronym refers to:

Posterior fossa abnormalities
Hemangioma
Arterial cerebrovascular anomalies
Cardiac abnormalities / coarctation
Eye abnormalities

An S is often added for:

Sternal defects
Supraumbilical raphe

PHACE – Ocular Associations

Possible ocular abnormalities include:

Microphthalmia
Optic nerve hypoplasia
Morning glory disc anomaly
Peripapillary staphyloma
Retinal vascular abnormalities
Strabismus
Congenital cataract
Glaucoma
Cranial nerve abnormalities

When to Consider PHACE Evaluation

Consider PHACE evaluation particularly in infants with:

Large segmental hemangioma of the face or scalp

Evaluation may include:

MRI/MRA of brain and neck
Cardiac examination
Echocardiography
Ophthalmic examination

Important Correction – Kasabach-Merritt Phenomenon

Kasabach-Merritt phenomenon is not associated with ordinary infantile hemangioma.

It is classically associated with:

Kaposiform hemangioendothelioma
Tufted angioma

and consists of:

Severe thrombocytopenia
Consumptive coagulopathy
Platelet trapping

A child with an apparent “hemangioma” plus profound thrombocytopenia should therefore prompt reconsideration of the diagnosis.

Airway Hemangioma

Some infants with extensive facial or segmental hemangiomas may have:

Subglottic
Airway

hemangiomas.

Risk is especially associated with a:

Beard-distribution hemangioma

involving the:

Chin
Lower lip
Mandibular region
Anterior neck

Symptoms such as:

Stridor
Hoarse cry
Respiratory distress

require urgent airway evaluation.

High-Output Cardiac Failure

Large or multifocal visceral hemangiomas, especially hepatic lesions, can rarely produce:

High-output cardiac failure

through extensive vascular shunting.

Imaging

Most superficial periocular IH can be diagnosed clinically.

Imaging is useful when there is:

Deep orbital involvement
Proptosis
Atypical presentation
Diagnostic uncertainty
Concern for PHACE
Concern for another orbital mass

MRI

MRI with contrast is preferred for defining:

Orbital extent
Relationship to optic nerve
Extraocular muscles
Intracranial structures

Typical proliferative-phase findings include:

Well-defined or lobulated lesion
T1 iso- to hypointensity
T2 hyperintensity
Strong homogeneous enhancement
Flow voids reflecting vascular channels

Ultrasound

Ultrasound with Doppler may demonstrate:

Solid vascular mass
High vascular density
Increased internal blood flow

It can be useful when MRI is unnecessary or unavailable.

CT can demonstrate:

Enhancing soft-tissue mass
Orbital extent

but is generally avoided when MRI or ultrasound can provide the needed information because of:

Ionizing radiation in infants.

Biopsy

Biopsy is rarely required in a classic infantile hemangioma.

Consider biopsy if:

Clinical course is atypical
Imaging is atypical
Tumor does not behave like IH
Malignancy is suspected

Differential Diagnosis

Important differentials include:

Capillary malformation / port-wine stain
Venous malformation
Lymphatic/venolymphatic malformation
Rhabdomyosarcoma
Neuroblastoma
Dermoid cyst
Orbital teratoma
Other vascular tumors

Infantile Hemangioma vs Port-Wine Stain

Infantile Hemangioma

Usually appears after birth
Proliferates rapidly
Raised or mass-forming
Eventually involutes

Port-Wine Stain

Present at birth
Flat
Grows proportionately with child
Does not spontaneously involute
May occur in V1 distribution in Sturge-Weber syndrome

Infantile Hemangioma vs Vascular Malformation

Infantile Hemangioma

Endothelial proliferation
Rapid postnatal growth
Spontaneous involution
GLUT1 positive

Vascular Malformation

Present from birth, though sometimes clinically occult
Grows proportionately
No proliferative/involution cycle
Endothelial turnover usually normal

Rhabdomyosarcoma

Consider when there is:

Rapidly progressive proptosis
Orbital mass in an older infant or child
No characteristic cutaneous hemangioma
Atypical imaging

Unlike IH, rhabdomyosarcoma does not follow the classic:

Proliferation → involution

pattern.

Treatment Principles

Not every periocular infantile hemangioma requires treatment.

Observation is appropriate when the lesion:

Does not obstruct the visual axis
Does not induce significant astigmatism
Does not cause strabismus
Does not cause proptosis or optic nerve compromise
Does not threaten skin integrity

Indications for Treatment

Treat when there is significant risk of:

Amblyopia
Visual-axis obstruction
Progressive astigmatism
Anisometropia
Strabismus
Exposure keratopathy
Optic neuropathy
Significant disfigurement
Ulceration
Airway compromise
Other serious systemic involvement

First-Line Therapy – Oral Propranolol

Oral propranolol is the modern first-line systemic treatment for problematic infantile hemangioma.

It has largely replaced systemic corticosteroids.

Mechanisms of Propranolol

Proposed mechanisms include:

Vasoconstriction
Reduced VEGF signaling
Reduced angiogenesis
Induction of endothelial apoptosis

Clinical improvement can begin rapidly.

Propranolol Dosing

A commonly used target is approximately:

2–3 mg/kg/day

divided into:

Twice-daily
Occasionally three-times-daily dosing

according to formulation and protocol.

Treatment is individualized by:

Pediatrics
Dermatology
Ophthalmology

Before Starting Propranolol

Assess:

Cardiac history
Heart rate
Blood pressure
Respiratory history
Feeding pattern
Risk of hypoglycemia

ECG or cardiology assessment is particularly appropriate when there is:

Abnormal cardiac examination
Bradycardia
Arrhythmia history
Relevant family cardiac history

Routine echocardiography is not required for every uncomplicated infant.

Propranolol Adverse Effects

Potential adverse effects include:

Hypoglycemia
Bradycardia
Hypotension
Bronchospasm
Sleep disturbance
Cold extremities

Preventing Hypoglycemia

Important parental instructions include:

Give propranolol with or shortly after feeding
Maintain regular feeding schedules
Hold doses during prolonged fasting
Hold treatment during significant vomiting or poor oral intake

Young infants are particularly vulnerable to:

Propranolol-associated hypoglycemia

PHACE and Propranolol

Propranolol is not absolutely contraindicated in PHACE.

However, severe cerebrovascular arterial abnormalities may theoretically increase ischemic risk if:

Blood pressure falls abruptly

Therefore children with suspected PHACE may require:

MRI/MRA
Cardiac assessment
Slow dose escalation
Multidisciplinary management

Duration of Propranolol Therapy

Therapy often continues through much of the proliferative period, commonly until approximately:

12 months of age
Sometimes longer for deep or recurrent lesions

Stopping too early can result in:

Rebound growth

Tapering practices vary.

Topical Timolol

Topical timolol may be useful for:

Small
Thin
Superficial

infantile hemangiomas.

It is not adequate for:

Large lesions
Deep orbital lesions
Vision-threatening bulky disease

Timolol Safety

Although topical, systemic absorption can occur.

Potential effects include:

Bradycardia
Hypotension
Bronchospasm

Use particular caution in:

Premature infants
Large treatment surfaces
Ulcerated skin

Corticosteroids

Systemic or intralesional corticosteroids were historically first-line therapy.

They are now generally reserved for:

Propranolol contraindication
Propranolol failure
Selected refractory cases

Steroid Adverse Effects

Systemic corticosteroids may cause:

Growth suppression
Cushingoid appearance
Hypertension
Irritability
Sleep disturbance
Infection risk
Adrenal suppression

Intralesional Steroids

Intralesional steroid injection is now used much less commonly.

Serious complications include:

Central retinal artery occlusion
Skin depigmentation
Fat atrophy
Necrosis
Hemorrhage

Because of these risks, injection near the orbit requires great caution.

Laser Therapy

Laser is not usually first-line for a deep periocular hemangioma.

It may be helpful for:

Residual superficial telangiectasia
Selected ulcerated superficial lesions
Residual cutaneous changes after involution

Pulsed-dye laser is generally preferred for superficial vascular skin changes.

Surgery

Surgical excision may be considered for:

Well-localized lesions
Persistent visual-axis obstruction
Residual fibrofatty deformity
Refractory disease
Diagnostic uncertainty

Large diffuse orbital lesions are less amenable to complete excision.

Surgical Risks

Potential risks include:

Significant bleeding
Scarring
Damage to orbital structures
Eyelid deformity

Amblyopia Treatment

Hemangioma treatment alone is not enough if amblyopia has already developed.

Management may include:

Cycloplegic refraction
Spectacle correction
Patching of the better eye
Atropine penalization in selected cases

Follow-Up

Vision-threatening periocular IH requires frequent ophthalmic follow-up during infancy.

Monitor:

Fixation and visual acuity
Pupillary occlusion
Cycloplegic refraction
Astigmatism
Anisometropia
Strabismus
Proptosis
Corneal exposure
Response to treatment

Frequency of Follow-Up

Young infants with significant lesions may require examination every:

Several weeks to a few months

depending on:

Age
Rate of growth
Amblyopia risk
Treatment response

Prognosis

Most infantile hemangiomas eventually undergo substantial:

Spontaneous involution

Overall prognosis is excellent when visual complications are identified early.

Visual outcome depends more on:

Prevention of amblyopia
Timely refractive correction
Maintenance of a clear visual axis

than on the cosmetic size of the lesion alone.

Residual Changes

After involution, some children may retain:

Telangiectasia
Fibrofatty tissue
Skin redundancy
Pigment change
Scarring

These may be addressed later with:

Laser
Plastic/oculoplastic surgery

if necessary.

Complications

Important complications include:

Amblyopia
Astigmatism
Anisometropia
Strabismus
Ptosis
Visual-axis obstruction
Proptosis
Exposure keratopathy
Rare compressive optic neuropathy
Ulceration
Cutaneous scarring
Residual deformity

Ophthalmology Pearls

Infantile hemangioma is a benign vascular tumor, not a vascular malformation or simple hamartoma.
It is usually absent or subtle at birth, then undergoes rapid proliferation during the first several months of life followed by gradual involution.
The classic superficial lesion is a bright-red “strawberry” hemangioma; deep lesions may be bluish and cause proptosis.
The most important ophthalmic complication is amblyopia, especially from ptosis, visual-axis occlusion, astigmatism, anisometropia, or strabismus.
Perform cycloplegic refraction even when the visual axis appears relatively clear because induced astigmatism may be substantial.
Oral propranolol is first-line systemic therapy for vision-threatening or otherwise problematic periocular IH.
Give propranolol with feeds and withhold during significant fasting, vomiting, or poor intake to reduce hypoglycemia risk.
Topical timolol is most useful for small, thin superficial lesions, not deep orbital disease.
Large segmental facial hemangiomas should prompt consideration of PHACE syndrome.
Kasabach-Merritt phenomenon is not a complication of ordinary infantile hemangioma; think kaposiform hemangioendothelioma or tufted angioma.
Infantile hemangiomas are characteristically GLUT1 positive.
Surgery and corticosteroids now have more selective roles because beta-blocker therapy has transformed management.

Classification Infantile hemangiomas are commonly classified as: Superficial Deep Combined They may also be: Focal/localized Segmental Multifocal Segmental facial lesions are particularly important because of their association with: PHACE syndrome

Superficial Infantile Hemangioma Typically appears as: Bright red Lobulated Raised Compressible The classic appearance is often described as: “Strawberry” hemangioma

Deep Infantile Hemangioma Deep lesions involve: Subcutaneous tissue Orbit They often appear: Bluish-purple Poorly defined externally Soft and compressible Deep orbital lesions may cause: Proptosis Globe displacement Ptosis Astigmatism Strabismus

Epidemiology Infantile hemangioma is the: Most common benign vascular tumor of infancy It occurs more frequently in: Girls Premature infants Low-birth-weight infants Multiple gestations Periocular lesions represent a smaller subset of all infantile hemangiomas.

Risk Factors Reported risk factors include: Prematurity Low birth weight Female sex Multiple gestation Advanced maternal age Placental abnormalities or procedures in some studies Most cases are: Sporadic

Pathophysiology Infantile hemangioma is a true vascular tumor rather than a vascular malformation. It demonstrates: Endothelial cell proliferation Increased angiogenic signaling Characteristic involution with maturation Unlike vascular malformations, IH has a: Proliferative phase followed by spontaneous regression.

Placental Hypothesis Infantile hemangioma and placental microvasculature share several markers, leading to hypotheses involving: Placental-like endothelial cells Embolized placental cells Shared developmental pathways However, a direct placental “metastasis” mechanism has not been definitively established.

Pathology Histology demonstrates: Lobular proliferation of capillary-sized vessels Benign endothelial cells Closely packed vascular channels A characteristic immunohistochemical marker is: GLUT1 positivity GLUT1 is useful in distinguishing infantile hemangioma from many vascular malformations.

Natural History Most infantile hemangiomas are: Absent or subtle at birth Apparent within the first several weeks of life Growth is most rapid during: The first few months of life Most proliferative growth occurs by approximately: 5 months of age although deeper lesions may continue enlarging somewhat longer.

Involution After the proliferative phase: Growth stabilizes Involution begins gradually Regression occurs over: Several years Residual changes may include: Telangiectatic vessels Fibrofatty tissue Skin redundancy Pigmentary change Scarring after ulceration

Ophthalmic Importance Periocular IH is particularly important because it can interfere with visual development. Major visual complications include: Amblyopia Astigmatism Anisometropia Visual-axis occlusion Ptosis Strabismus

Amblyopia Amblyopia may be: Deprivation Amblyopia From: Ptosis Eyelid mass blocking the pupil Anisometropic / Astigmatic Amblyopia From mechanical pressure on the globe causing: Corneal astigmatism Refractive asymmetry Strabismic Amblyopia From: Globe displacement Extraocular muscle involvement

Astigmatism Mechanical pressure from an upper-eyelid or orbital lesion may deform the cornea and induce: Astigmatism Anisometropia This may persist even after the hemangioma involutes. Therefore: Cycloplegic refraction is essential in periocular IH.

Strabismus Strabismus may develop from: Globe displacement Motility restriction Visual deprivation Anisometropia

Proptosis Deep orbital hemangiomas may cause: Axial or nonaxial proptosis Exposure keratopathy Optic nerve compression in severe cases

Clinical History Parents often report: Small pink or red mark appearing shortly after birth Rapid enlargement over weeks Progressive eyelid swelling Partial occlusion of the eye Deep lesions may present primarily with: Proptosis Bluish eyelid swelling

Examination A complete pediatric ophthalmic examination should assess: Fixation behavior Age-appropriate visual acuity Pupils Ocular alignment Motility Degree of ptosis Pupillary occlusion Proptosis Corneal exposure Cycloplegic refraction Dilated fundus examination

Typical Lesion Appearance Superficial lesions: Bright red Raised Lobulated Blanch partially with pressure Deep lesions: Blue-purple Subcutaneous Compressible Lesions may become more prominent with: Crying Dependent positioning Valsalva-like maneuvers

PHACE Syndrome Large segmental facial hemangiomas, particularly involving the upper face, may be associated with: PHACE syndrome The acronym refers to: Posterior fossa abnormalities Hemangioma Arterial cerebrovascular anomalies Cardiac abnormalities / coarctation Eye abnormalities An S is often added for: Sternal defects Supraumbilical raphe

PHACE – Ocular Associations Possible ocular abnormalities include: Microphthalmia Optic nerve hypoplasia Morning glory disc anomaly Peripapillary staphyloma Retinal vascular abnormalities Strabismus Congenital cataract Glaucoma Cranial nerve abnormalities

When to Consider PHACE Evaluation Consider PHACE evaluation particularly in infants with: Large segmental hemangioma of the face or scalp Evaluation may include: MRI/MRA of brain and neck Cardiac examination Echocardiography Ophthalmic examination

Important Correction – Kasabach-Merritt Phenomenon Kasabach-Merritt phenomenon is not associated with ordinary infantile hemangioma. It is classically associated with: Kaposiform hemangioendothelioma Tufted angioma and consists of: Severe thrombocytopenia Consumptive coagulopathy Platelet trapping A child with an apparent “hemangioma” plus profound thrombocytopenia should therefore prompt reconsideration of the diagnosis.

Airway Hemangioma Some infants with extensive facial or segmental hemangiomas may have: Subglottic Airway hemangiomas. Risk is especially associated with a: Beard-distribution hemangioma involving the: Chin Lower lip Mandibular region Anterior neck Symptoms such as: Stridor Hoarse cry Respiratory distress require urgent airway evaluation.

High-Output Cardiac Failure Large or multifocal visceral hemangiomas, especially hepatic lesions, can rarely produce: High-output cardiac failure through extensive vascular shunting.

Imaging Most superficial periocular IH can be diagnosed clinically. Imaging is useful when there is: Deep orbital involvement Proptosis Atypical presentation Diagnostic uncertainty Concern for PHACE Concern for another orbital mass

MRI MRI with contrast is preferred for defining: Orbital extent Relationship to optic nerve Extraocular muscles Intracranial structures Typical proliferative-phase findings include: Well-defined or lobulated lesion T1 iso- to hypointensity T2 hyperintensity Strong homogeneous enhancement Flow voids reflecting vascular channels

Ultrasound Ultrasound with Doppler may demonstrate: Solid vascular mass High vascular density Increased internal blood flow It can be useful when MRI is unnecessary or unavailable.

CT CT can demonstrate: Enhancing soft-tissue mass Orbital extent but is generally avoided when MRI or ultrasound can provide the needed information because of: Ionizing radiation in infants.

Biopsy Biopsy is rarely required in a classic infantile hemangioma. Consider biopsy if: Clinical course is atypical Imaging is atypical Tumor does not behave like IH Malignancy is suspected

Differential Diagnosis Important differentials include: Capillary malformation / port-wine stain Venous malformation Lymphatic/venolymphatic malformation Rhabdomyosarcoma Neuroblastoma Dermoid cyst Orbital teratoma Other vascular tumors

Infantile Hemangioma vs Port-Wine Stain Infantile Hemangioma Usually appears after birth Proliferates rapidly Raised or mass-forming Eventually involutes Port-Wine Stain Present at birth Flat Grows proportionately with child Does not spontaneously involute May occur in V1 distribution in Sturge-Weber syndrome

Infantile Hemangioma vs Vascular Malformation Infantile Hemangioma Endothelial proliferation Rapid postnatal growth Spontaneous involution GLUT1 positive Vascular Malformation Present from birth, though sometimes clinically occult Grows proportionately No proliferative/involution cycle Endothelial turnover usually normal

Rhabdomyosarcoma Consider when there is: Rapidly progressive proptosis Orbital mass in an older infant or child No characteristic cutaneous hemangioma Atypical imaging Unlike IH, rhabdomyosarcoma does not follow the classic: Proliferation → involution pattern.

Treatment Principles Not every periocular infantile hemangioma requires treatment. Observation is appropriate when the lesion: Does not obstruct the visual axis Does not induce significant astigmatism Does not cause strabismus Does not cause proptosis or optic nerve compromise Does not threaten skin integrity

Indications for Treatment Treat when there is significant risk of: Amblyopia Visual-axis obstruction Progressive astigmatism Anisometropia Strabismus Exposure keratopathy Optic neuropathy Significant disfigurement Ulceration Airway compromise Other serious systemic involvement

First-Line Therapy – Oral Propranolol Oral propranolol is the modern first-line systemic treatment for problematic infantile hemangioma. It has largely replaced systemic corticosteroids.

Mechanisms of Propranolol Proposed mechanisms include: Vasoconstriction Reduced VEGF signaling Reduced angiogenesis Induction of endothelial apoptosis Clinical improvement can begin rapidly.

Propranolol Dosing A commonly used target is approximately: 2–3 mg/kg/day divided into: Twice-daily Occasionally three-times-daily dosing according to formulation and protocol. Treatment is individualized by: Pediatrics Dermatology Ophthalmology

Before Starting Propranolol Assess: Cardiac history Heart rate Blood pressure Respiratory history Feeding pattern Risk of hypoglycemia ECG or cardiology assessment is particularly appropriate when there is: Abnormal cardiac examination Bradycardia Arrhythmia history Relevant family cardiac history Routine echocardiography is not required for every uncomplicated infant.

Propranolol Adverse Effects Potential adverse effects include: Hypoglycemia Bradycardia Hypotension Bronchospasm Sleep disturbance Cold extremities

Preventing Hypoglycemia Important parental instructions include: Give propranolol with or shortly after feeding Maintain regular feeding schedules Hold doses during prolonged fasting Hold treatment during significant vomiting or poor oral intake Young infants are particularly vulnerable to: Propranolol-associated hypoglycemia

PHACE and Propranolol Propranolol is not absolutely contraindicated in PHACE. However, severe cerebrovascular arterial abnormalities may theoretically increase ischemic risk if: Blood pressure falls abruptly Therefore children with suspected PHACE may require: MRI/MRA Cardiac assessment Slow dose escalation Multidisciplinary management

Duration of Propranolol Therapy Therapy often continues through much of the proliferative period, commonly until approximately: 12 months of age Sometimes longer for deep or recurrent lesions Stopping too early can result in: Rebound growth Tapering practices vary.

Topical Timolol Topical timolol may be useful for: Small Thin Superficial infantile hemangiomas. It is not adequate for: Large lesions Deep orbital lesions Vision-threatening bulky disease

Timolol Safety Although topical, systemic absorption can occur. Potential effects include: Bradycardia Hypotension Bronchospasm Use particular caution in: Premature infants Large treatment surfaces Ulcerated skin

Corticosteroids Systemic or intralesional corticosteroids were historically first-line therapy. They are now generally reserved for: Propranolol contraindication Propranolol failure Selected refractory cases

Steroid Adverse Effects Systemic corticosteroids may cause: Growth suppression Cushingoid appearance Hypertension Irritability Sleep disturbance Infection risk Adrenal suppression

Intralesional Steroids Intralesional steroid injection is now used much less commonly. Serious complications include: Central retinal artery occlusion Skin depigmentation Fat atrophy Necrosis Hemorrhage Because of these risks, injection near the orbit requires great caution.

Laser Therapy Laser is not usually first-line for a deep periocular hemangioma. It may be helpful for: Residual superficial telangiectasia Selected ulcerated superficial lesions Residual cutaneous changes after involution Pulsed-dye laser is generally preferred for superficial vascular skin changes.

Surgery Surgical excision may be considered for: Well-localized lesions Persistent visual-axis obstruction Residual fibrofatty deformity Refractory disease Diagnostic uncertainty Large diffuse orbital lesions are less amenable to complete excision.

Surgical Risks Potential risks include: Significant bleeding Scarring Damage to orbital structures Eyelid deformity

Amblyopia Treatment Hemangioma treatment alone is not enough if amblyopia has already developed. Management may include: Cycloplegic refraction Spectacle correction Patching of the better eye Atropine penalization in selected cases

Follow-Up Vision-threatening periocular IH requires frequent ophthalmic follow-up during infancy. Monitor: Fixation and visual acuity Pupillary occlusion Cycloplegic refraction Astigmatism Anisometropia Strabismus Proptosis Corneal exposure Response to treatment

Frequency of Follow-Up Young infants with significant lesions may require examination every: Several weeks to a few months depending on: Age Rate of growth Amblyopia risk Treatment response

Prognosis Most infantile hemangiomas eventually undergo substantial: Spontaneous involution Overall prognosis is excellent when visual complications are identified early. Visual outcome depends more on: Prevention of amblyopia Timely refractive correction Maintenance of a clear visual axis than on the cosmetic size of the lesion alone.

Residual Changes After involution, some children may retain: Telangiectasia Fibrofatty tissue Skin redundancy Pigment change Scarring These may be addressed later with: Laser Plastic/oculoplastic surgery if necessary.

Complications Important complications include: Amblyopia Astigmatism Anisometropia Strabismus Ptosis Visual-axis obstruction Proptosis Exposure keratopathy Rare compressive optic neuropathy Ulceration Cutaneous scarring Residual deformity

Ophthalmology Pearls Infantile hemangioma is a benign vascular tumor, not a vascular malformation or simple hamartoma. It is usually absent or subtle at birth, then undergoes rapid proliferation during the first several months of life followed by gradual involution. The classic superficial lesion is a bright-red “strawberry” hemangioma; deep lesions may be bluish and cause proptosis. The most important ophthalmic complication is amblyopia, especially from ptosis, visual-axis occlusion, astigmatism, anisometropia, or strabismus. Perform cycloplegic refraction even when the visual axis appears relatively clear because induced astigmatism may be substantial. Oral propranolol is first-line systemic therapy for vision-threatening or otherwise problematic periocular IH. Give propranolol with feeds and withhold during significant fasting, vomiting, or poor intake to reduce hypoglycemia risk. Topical timolol is most useful for small, thin superficial lesions, not deep orbital disease. Large segmental facial hemangiomas should prompt consideration of PHACE syndrome. Kasabach-Merritt phenomenon is not a complication of ordinary infantile hemangioma; think kaposiform hemangioendothelioma or tufted angioma. Infantile hemangiomas are characteristically GLUT1 positive. Surgery and corticosteroids now have more selective roles because beta-blocker therapy has transformed management.

Published on: September 20, 2026

Ophthalmology – Pediculosis Ciliaris (Phthiriasis Palpebrarum)

Ophthalmology – Pediculosis Ciliaris (Phthiriasis Palpebrarum)

Basics

Description

Pediculosis ciliaris, also called phthiriasis palpebrarum, is infestation of the:

Eyelashes
Eyelid margins
Occasionally eyebrows

by the pubic or crab louse:

Phthirus pubis

It typically causes:

Intense eyelid pruritus
Burning
Chronic blepharitis
Conjunctival irritation

Because the lice and nits may be subtle, the condition can be mistaken for ordinary blepharitis.

Synonyms

Terms include:

Pediculosis ciliaris
Phthiriasis palpebrarum
Phthirus pubis infestation
Pubic lice
Crab lice

Transmission

P. pubis is most commonly transmitted through:

Close physical or sexual contact

Eyelash infestation may occur through:

Hand transfer from another body site
Close face-to-face contact
Contaminated bedding or clothing, less commonly

Fomite transmission is possible but generally less important than direct close contact.

Pediatric Considerations

Identification of pubic lice on a child’s eyelashes requires:

Careful safeguarding assessment

because sexual transmission or abuse must be considered.

However, ocular infestation does not by itself prove sexual abuse, since nonsexual transmission can occur.

Evaluation should include:

Detailed history
Examination for infestation elsewhere
Assessment for other injuries or concerning findings
Consideration of STI testing when appropriate
Involvement of pediatric safeguarding/child-protection professionals according to local law and clinical circumstances

Epidemiology

Pubic lice occur worldwide.

They can affect:

Adolescents
Adults
Children

There is no important sex predilection.

Ocular infestation is much less common than genital infestation.

Risk Factors

Risk factors include:

Close contact with an infested individual
Multiple sexual partners
Shared bedding or clothing
Household exposure
Crowded living conditions

Poor hygiene is not required for infestation and should not be assumed.

Organism

Phthirus pubis is:

Short
Broad
Crab-like
Approximately 1–2 mm in size

It possesses prominent claws adapted for gripping coarse hair.

Life Cycle

The life cycle includes:

Egg / nit
Nymph
Adult louse

Nits are firmly cemented to hair shafts.

Adult lice feed repeatedly on:

Human blood

and cannot survive for long away from the host.

Pathophysiology

The louse attaches to hair and feeds by piercing the skin.

Symptoms result from:

Mechanical irritation
Local inflammatory response
Hypersensitivity to louse saliva
Excoriation from scratching

Associated Ocular Disease

Ocular infestation may cause:

Blepharitis
Blepharoconjunctivitis
Follicular conjunctivitis
Eyelid edema
Excoriation
Secondary bacterial infection

History

Typical complaints include:

Intense eyelid itching
Burning
Foreign-body sensation
Red eye
Chronic “blepharitis” not responding to routine therapy

Symptoms may be worse:

At night

Ask about:

Pruritus elsewhere on the body
Genital itching
Household contacts
Sexual contacts when age-appropriate
Previous unsuccessful blepharitis treatment

Physical Examination

Slit-lamp examination may directly demonstrate:

Adult lice
Nymphs
Nits

Look carefully at:

Lash bases
Lash shafts
Eyelid skin
Eyebrows

Appearance of Lice

Adult lice may appear as:

Brown-gray
Translucent
Small mobile bodies

They may be difficult to see because they remain close to the lid margin.

Movement under magnification can confirm the diagnosis.

Appearance of Nits

Nits appear as:

Small
Oval
White-gray or translucent structures

firmly attached to:

Eyelash shafts

Unlike ordinary debris, they cannot be easily brushed away.

Eyelid Findings

Other findings may include:

Crusting
Excoriation
Blood-tinged debris
Eyelid erythema
Eyelid edema

Severe infestations may produce significant inflammatory swelling.

Conjunctival Findings

Possible findings include:

Conjunctival injection
Follicular conjunctivitis
Irritation
Tearing

Maculae Ceruleae

Occasionally, painless:

Blue-gray macules

may occur around affected skin.

These are called:

Maculae ceruleae

and are thought to result from altered blood pigments at louse feeding sites.

Papular Reaction

Small erythematous papules may occur at feeding sites because of:

Local hypersensitivity
Inflammation

Lymphadenopathy

Reactive:

Preauricular
Submandibular

lymphadenopathy may occasionally occur.

Diagnosis

Diagnosis is usually clinical and made by:

Direct visualization of lice or nits on the eyelashes

under slit-lamp magnification.

Microscopy

Microscopic examination can confirm the organism when diagnosis is uncertain.

Characteristic findings include:

Broad crab-like body
Large claws on posterior legs

Differential Diagnosis

Important differentials include:

Seborrheic blepharitis
Staphylococcal blepharitis
Demodex blepharitis
Allergic blepharitis
Atopic dermatitis
Eyelid eczema
Rosacea
Viral blepharoconjunctivitis
Herpes simplex blepharitis
Eyelid malignancy in persistent unilateral disease

Pediculosis vs Demodex

Phthirus pubis

Visible lice
Firmly attached nits
Intense pruritus
Blood/debris at lash bases

Demodex

Classically produces:

Cylindrical dandruff / collarettes at lash bases
Chronic blepharitis
No visible crab-like lice or nits

Treatment Principles

Treatment has several goals:

Eradicate adult lice.
Remove nits.
Treat infestation elsewhere on the body.
Treat close or sexual contacts when appropriate.
Prevent reinfestation.

Mechanical Removal

For eyelash infestation:

Mechanical removal of lice and nits is a key treatment.

Under magnification, lice and nits may be removed with:

Fine forceps

This can substantially reduce parasite burden immediately.

Ophthalmic Ointment / Petrolatum

A bland occlusive ophthalmic ointment or petrolatum may be applied to:

Eyelid margins
Eyelashes

several times daily for approximately:

7–10 days

The purpose is to:

Immobilize
Suffocate

lice.

Examples may include:

Plain petrolatum
Bland ophthalmic ointment

Antibiotic ointment such as erythromycin may be used if there is significant secondary blepharitis, although the antibiotic itself is not the primary pediculicidal mechanism.

Important Medication Safety

Standard pediculicide shampoos or lotions should not be applied directly to the eye or eyelid margin unless specifically formulated and supervised for ophthalmic use.

Avoid ocular exposure to:

Permethrin creams/rinses
Pyrethrin products
Malathion
Other insecticidal lotions

because they can cause significant ocular irritation or toxicity.

Treatment of Pubic or Body Infestation

If lice are present at genital or other body sites, treatment may include:

Permethrin 1%
Pyrethrins with piperonyl butoxide

according to current pediculosis protocols.

These are applied to:

Nonocular affected hair-bearing areas

and should be kept away from the eyes.

Oral Ivermectin

Oral ivermectin may be considered for:

Extensive infestation
Refractory disease
Treatment failure

A common regimen is approximately:

200–250 µg/kg orally, repeated after 7–14 days

depending on local protocol.

Ivermectin does not reliably kill eggs, which is why repeat dosing is often used.

Pregnancy and Breastfeeding

Medication selection requires additional caution.

In general:

Mechanical removal
Local bland ophthalmic ointment

are attractive options for eyelash disease.

Systemic ivermectin is generally avoided during pregnancy unless specifically justified.

Lindane

Lindane is no longer favored and is generally avoided because of:

Neurotoxicity
Resistance
Safer alternatives

It should not be considered routine therapy.

Malathion

Malathion may be effective for pubic lice but:

Is irritating
Is flammable
Must not contact the eyes

It is not a standard eyelash treatment.

Treatment of Contacts

Recent sexual partners should be:

Informed
Examined when appropriate
Treated if infested or according to applicable public-health recommendations

Close household contacts should also be considered if exposure is suspected.

Sexual Activity

Patients should avoid:

Sexual contact
Close intimate contact

until:

They have been treated
Their relevant partners have been treated

Condoms do not reliably prevent pubic lice transmission because lice infest hair-bearing skin outside the area covered by a condom.

Clothing and Bedding

Clothing, towels, and bedding recently used by the affected person should be:

Machine washed in hot water
Dried on a hot cycle

Items that cannot be washed may be:

Dry-cleaned
Sealed away from body contact for an appropriate interval

Environmental fumigation is unnecessary.

STI Evaluation

Because pubic lice can be sexually transmitted, adolescents and adults with genital infestation should be assessed for risk of other sexually transmitted infections.

Testing may include, according to individual risk:

HIV
Syphilis
Gonorrhea
Chlamydia

This should be based on sexual history and local recommendations rather than performed identically in every patient.

Pediatric Safeguarding

In a child with phthiriasis palpebrarum:

Examine for lice elsewhere
Assess other household members
Determine whether plausible nonsexual transmission exists
Consider sexual abuse and other safeguarding concerns

When concern exists, involve:

Pediatrician
Child-protection team
Appropriate safeguarding authorities

according to local legal requirements.

Follow-Up

Re-examination is generally appropriate after approximately:

1 week

Assess for:

Persistent live lice
Newly hatched nymphs
Remaining nits
Secondary infection

Repeat treatment may be required.

Treatment Failure

Persistent infestation may result from:

Inadequate mechanical removal
Failure to repeat treatment
Untreated contacts
Re-exposure
Incorrect diagnosis
Resistance to topical pediculicides

Prognosis

Prognosis is:

Excellent

when lice are eradicated and reinfestation is prevented.

Symptoms usually resolve promptly after successful treatment.

Complications

Possible complications include:

Chronic blepharoconjunctivitis
Excoriation
Secondary bacterial infection
Eyelid edema
Recurrent infestation

Permanent visual loss is extremely unusual.

Ophthalmology Pearls

Pediculosis ciliaris = infestation of the eyelashes by Phthirus pubis.
Think of it in persistent, intensely pruritic blepharitis that does not respond to routine treatment.
Slit-lamp examination may reveal mobile crab-like lice and firmly attached nits on the lashes.
Nits are attached to the lash shaft and do not brush away like ordinary debris.
Mechanical removal with fine forceps plus bland occlusive ophthalmic ointment/petrolatum is a mainstay of eyelash treatment.
Do not apply standard pediculicide shampoos or lotions directly to the ocular surface.
Treat any simultaneous pubic or body infestation and address exposed contacts to prevent reinfestation.
Lindane is no longer routine therapy because safer alternatives exist.
Consider screening for other STIs when sexual transmission is plausible.
In children, phthiriasis palpebrarum should prompt careful safeguarding assessment for possible sexual abuse, while recognizing that nonsexual transmission can occur.

Synonyms Terms include: Pediculosis ciliaris Phthiriasis palpebrarum Phthirus pubis infestation Pubic lice Crab lice

Transmission P. pubis is most commonly transmitted through: Close physical or sexual contact Eyelash infestation may occur through: Hand transfer from another body site Close face-to-face contact Contaminated bedding or clothing, less commonly Fomite transmission is possible but generally less important than direct close contact.

Pediatric Considerations Identification of pubic lice on a child’s eyelashes requires: Careful safeguarding assessment because sexual transmission or abuse must be considered. However, ocular infestation does not by itself prove sexual abuse, since nonsexual transmission can occur. Evaluation should include: Detailed history Examination for infestation elsewhere Assessment for other injuries or concerning findings Consideration of STI testing when appropriate Involvement of pediatric safeguarding/child-protection professionals according to local law and clinical circumstances

Epidemiology Pubic lice occur worldwide. They can affect: Adolescents Adults Children There is no important sex predilection. Ocular infestation is much less common than genital infestation.

Risk Factors Risk factors include: Close contact with an infested individual Multiple sexual partners Shared bedding or clothing Household exposure Crowded living conditions Poor hygiene is not required for infestation and should not be assumed.

Organism Phthirus pubis is: Short Broad Crab-like Approximately 1–2 mm in size It possesses prominent claws adapted for gripping coarse hair.

Life Cycle The life cycle includes: Egg / nit Nymph Adult louse Nits are firmly cemented to hair shafts. Adult lice feed repeatedly on: Human blood and cannot survive for long away from the host.

Pathophysiology The louse attaches to hair and feeds by piercing the skin. Symptoms result from: Mechanical irritation Local inflammatory response Hypersensitivity to louse saliva Excoriation from scratching

Associated Ocular Disease Ocular infestation may cause: Blepharitis Blepharoconjunctivitis Follicular conjunctivitis Eyelid edema Excoriation Secondary bacterial infection

History Typical complaints include: Intense eyelid itching Burning Foreign-body sensation Red eye Chronic “blepharitis” not responding to routine therapy Symptoms may be worse: At night Ask about: Pruritus elsewhere on the body Genital itching Household contacts Sexual contacts when age-appropriate Previous unsuccessful blepharitis treatment

Physical Examination Slit-lamp examination may directly demonstrate: Adult lice Nymphs Nits Look carefully at: Lash bases Lash shafts Eyelid skin Eyebrows

Appearance of Lice Adult lice may appear as: Brown-gray Translucent Small mobile bodies They may be difficult to see because they remain close to the lid margin. Movement under magnification can confirm the diagnosis.

Appearance of Nits Nits appear as: Small Oval White-gray or translucent structures firmly attached to: Eyelash shafts Unlike ordinary debris, they cannot be easily brushed away.

Eyelid Findings Other findings may include: Crusting Excoriation Blood-tinged debris Eyelid erythema Eyelid edema Severe infestations may produce significant inflammatory swelling.

Conjunctival Findings Possible findings include: Conjunctival injection Follicular conjunctivitis Irritation Tearing

Maculae Ceruleae Occasionally, painless: Blue-gray macules may occur around affected skin. These are called: Maculae ceruleae and are thought to result from altered blood pigments at louse feeding sites.

Papular Reaction Small erythematous papules may occur at feeding sites because of: Local hypersensitivity Inflammation

Lymphadenopathy Reactive: Preauricular Submandibular lymphadenopathy may occasionally occur.

Diagnosis Diagnosis is usually clinical and made by: Direct visualization of lice or nits on the eyelashes under slit-lamp magnification.

Microscopy Microscopic examination can confirm the organism when diagnosis is uncertain. Characteristic findings include: Broad crab-like body Large claws on posterior legs

Differential Diagnosis Important differentials include: Seborrheic blepharitis Staphylococcal blepharitis Demodex blepharitis Allergic blepharitis Atopic dermatitis Eyelid eczema Rosacea Viral blepharoconjunctivitis Herpes simplex blepharitis Eyelid malignancy in persistent unilateral disease

Pediculosis vs Demodex Phthirus pubis Visible lice Firmly attached nits Intense pruritus Blood/debris at lash bases Demodex Classically produces: Cylindrical dandruff / collarettes at lash bases Chronic blepharitis No visible crab-like lice or nits

Treatment Principles Treatment has several goals: Eradicate adult lice. Remove nits. Treat infestation elsewhere on the body. Treat close or sexual contacts when appropriate. Prevent reinfestation.

Mechanical Removal For eyelash infestation: Mechanical removal of lice and nits is a key treatment. Under magnification, lice and nits may be removed with: Fine forceps This can substantially reduce parasite burden immediately.

Ophthalmic Ointment / Petrolatum A bland occlusive ophthalmic ointment or petrolatum may be applied to: Eyelid margins Eyelashes several times daily for approximately: 7–10 days The purpose is to: Immobilize Suffocate lice. Examples may include: Plain petrolatum Bland ophthalmic ointment Antibiotic ointment such as erythromycin may be used if there is significant secondary blepharitis, although the antibiotic itself is not the primary pediculicidal mechanism.

Important Medication Safety Standard pediculicide shampoos or lotions should not be applied directly to the eye or eyelid margin unless specifically formulated and supervised for ophthalmic use. Avoid ocular exposure to: Permethrin creams/rinses Pyrethrin products Malathion Other insecticidal lotions because they can cause significant ocular irritation or toxicity.

Treatment of Pubic or Body Infestation If lice are present at genital or other body sites, treatment may include: Permethrin 1% Pyrethrins with piperonyl butoxide according to current pediculosis protocols. These are applied to: Nonocular affected hair-bearing areas and should be kept away from the eyes.

Oral Ivermectin Oral ivermectin may be considered for: Extensive infestation Refractory disease Treatment failure A common regimen is approximately: 200–250 µg/kg orally, repeated after 7–14 days depending on local protocol. Ivermectin does not reliably kill eggs, which is why repeat dosing is often used.

Pregnancy and Breastfeeding Medication selection requires additional caution. In general: Mechanical removal Local bland ophthalmic ointment are attractive options for eyelash disease. Systemic ivermectin is generally avoided during pregnancy unless specifically justified.

Lindane Lindane is no longer favored and is generally avoided because of: Neurotoxicity Resistance Safer alternatives It should not be considered routine therapy.

Malathion Malathion may be effective for pubic lice but: Is irritating Is flammable Must not contact the eyes It is not a standard eyelash treatment.

Treatment of Contacts Recent sexual partners should be: Informed Examined when appropriate Treated if infested or according to applicable public-health recommendations Close household contacts should also be considered if exposure is suspected.

Sexual Activity Patients should avoid: Sexual contact Close intimate contact until: They have been treated Their relevant partners have been treated Condoms do not reliably prevent pubic lice transmission because lice infest hair-bearing skin outside the area covered by a condom.

Clothing and Bedding Clothing, towels, and bedding recently used by the affected person should be: Machine washed in hot water Dried on a hot cycle Items that cannot be washed may be: Dry-cleaned Sealed away from body contact for an appropriate interval Environmental fumigation is unnecessary.

STI Evaluation Because pubic lice can be sexually transmitted, adolescents and adults with genital infestation should be assessed for risk of other sexually transmitted infections. Testing may include, according to individual risk: HIV Syphilis Gonorrhea Chlamydia This should be based on sexual history and local recommendations rather than performed identically in every patient.

Pediatric Safeguarding In a child with phthiriasis palpebrarum: Examine for lice elsewhere Assess other household members Determine whether plausible nonsexual transmission exists Consider sexual abuse and other safeguarding concerns When concern exists, involve: Pediatrician Child-protection team Appropriate safeguarding authorities according to local legal requirements.

Follow-Up Re-examination is generally appropriate after approximately: 1 week Assess for: Persistent live lice Newly hatched nymphs Remaining nits Secondary infection Repeat treatment may be required.

Treatment Failure Persistent infestation may result from: Inadequate mechanical removal Failure to repeat treatment Untreated contacts Re-exposure Incorrect diagnosis Resistance to topical pediculicides

Prognosis Prognosis is: Excellent when lice are eradicated and reinfestation is prevented. Symptoms usually resolve promptly after successful treatment.

Complications Possible complications include: Chronic blepharoconjunctivitis Excoriation Secondary bacterial infection Eyelid edema Recurrent infestation Permanent visual loss is extremely unusual.

Ophthalmology Pearls Pediculosis ciliaris = infestation of the eyelashes by Phthirus pubis. Think of it in persistent, intensely pruritic blepharitis that does not respond to routine treatment. Slit-lamp examination may reveal mobile crab-like lice and firmly attached nits on the lashes. Nits are attached to the lash shaft and do not brush away like ordinary debris. Mechanical removal with fine forceps plus bland occlusive ophthalmic ointment/petrolatum is a mainstay of eyelash treatment. Do not apply standard pediculicide shampoos or lotions directly to the ocular surface. Treat any simultaneous pubic or body infestation and address exposed contacts to prevent reinfestation. Lindane is no longer routine therapy because safer alternatives exist. Consider screening for other STIs when sexual transmission is plausible. In children, phthiriasis palpebrarum should prompt careful safeguarding assessment for possible sexual abuse, while recognizing that nonsexual transmission can occur.

Published on: September 20, 2026

Ophthalmology – Pediatric Optic Nerve Hypoplasia

Ophthalmology – Pediatric Optic Nerve Hypoplasia

Basics

Description

Optic nerve hypoplasia (ONH) is a congenital, nonprogressive optic nerve disorder characterized by an abnormally small optic nerve with a reduced number of retinal ganglion cell axons.

It may be:

Unilateral
Bilateral
Symmetric
Asymmetric

Visual function ranges from:

Normal or near-normal
Mild impairment
Profound visual loss

ONH may occur as an isolated ocular finding or with:

Midline brain abnormalities
Pituitary dysfunction
Developmental abnormalities

Septo-Optic Dysplasia

Septo-optic dysplasia (SOD) traditionally refers to the presence of at least two of the following:

Optic nerve hypoplasia
Pituitary hormone dysfunction
Midline brain abnormality

Midline abnormalities may include:

Absent septum pellucidum
Corpus callosum hypoplasia or agenesis

The term de Morsier syndrome is historical.

Importantly:

Absence of the septum pellucidum alone does not predict endocrine dysfunction, and significant endocrinopathy can occur even with otherwise normal MRI findings.

Epidemiology

ONH is among the most common congenital optic nerve abnormalities in children.

Most cases are:

Sporadic

Bilateral involvement is common, but unilateral disease is frequently encountered.

Risk Factors

Most children have no clearly identifiable prenatal cause.

Reported associations include:

Maternal alcohol exposure
Young maternal age
Prematurity
Abnormal fetal growth
Maternal diabetes
Certain prenatal medication or drug exposures

Older literature has reported associations with:

Some anticonvulsants
Quinine
PCP
LSD

but these associations are not consistently established.

Maternal Diabetes

Maternal diabetes is particularly associated with:

Superior segmental optic nerve hypoplasia

also called:

Topless disc syndrome

This causes:

Superior disc hypoplasia
Superior RNFL loss
Corresponding inferior visual field defect

Genetics

Most ONH is sporadic.

Rare genetic associations include abnormalities involving:

HESX1
SOX2
SOX3
OTX2
PAX6
Other genes involved in forebrain and pituitary development

Genetic evaluation is especially appropriate when there is:

Bilateral severe ONH
Syndromic appearance
Multiple congenital anomalies
Strong family history
Pituitary abnormalities

Associated Genetic and Developmental Disorders

ONH may occur with:

Aniridia
Albinism
Midline developmental syndromes
Pituitary developmental abnormalities
Cortical migration disorders

Congenital infection and prenatal cerebral injury may also coexist with optic nerve hypoplasia-like appearances.

Pathophysiology

The primary abnormality is:

Reduced number of optic nerve axons

Possible mechanisms include:

Abnormal retinal ganglion cell differentiation
Excessive developmental apoptosis
Abnormal axonal guidance
Prenatal injury to the developing visual system

The outer retinal layers are generally preserved unless another retinal disorder is present.

Pathology

Histologically there is:

Reduced retinal ganglion cell population
Reduced RNFL
Reduced optic nerve axons
Small optic nerve caliber

Clinical Presentation

Bilateral ONH

Usually presents early with:

Poor visual behavior
Poor fixation
Nystagmus
Developmental concerns

Nystagmus often appears during the first few months of life.

Unilateral ONH

May present later with:

Strabismus
Amblyopia
Failed vision screening
Incidental optic disc abnormality

A child with unilateral ONH may otherwise be systemically normal.

Visual Acuity

Visual function is highly variable.

It may range from:

20/20 to profound visual impairment

A key principle:

Disc appearance correlates poorly with visual function.

A very small optic nerve may retain useful vision, while a mildly hypoplastic nerve may function poorly.

History

Ask about:

Poor fixation
Nystagmus
Strabismus
Developmental delay
Seizures
Abnormal growth
Hypoglycemia
Prolonged neonatal jaundice
Excessive thirst or urination
Prenatal alcohol or medication exposure
Maternal diabetes
Family history of developmental or endocrine disease

Endocrine Warning Signs

Important clues to pituitary dysfunction include:

Neonatal hypoglycemia
Prolonged jaundice
Poor growth
Failure to thrive
Micropenis
Cryptorchidism
Recurrent seizures
Polyuria/polydipsia
Abnormal puberty

These findings warrant urgent endocrine assessment.

Physical Examination

Perform a complete pediatric ophthalmic examination including:

Age-appropriate visual acuity
Pupils
Ocular alignment
Motility
Cycloplegic refraction
Slit-lamp examination
Dilated fundus examination

Optic Disc Appearance

Classic findings include:

Small optic disc
Pale or gray disc
Reduced neuroretinal tissue
Double-ring sign

Double-Ring Sign

The double-ring sign consists of:

Small true optic nerve
Surrounding larger ring corresponding to the normal-sized scleral canal and adjacent tissue

It is one of the classic signs of ONH.

Disc–Macula Relationship

Because the optic disc is abnormally small, the distance from:

Disc center
Fovea

appears disproportionately large compared with disc diameter.

A reduced disc diameter-to-disc–macula distance ratio supports the diagnosis.

Retinal Vessels

Associated features may include:

Relative vessel crowding
Tortuosity
Immature vascular pattern

These findings are supportive but not diagnostic.

Foveal Hypoplasia

Some children with ONH may have associated:

Foveal hypoplasia

particularly when there is an underlying developmental or syndromic disorder.

OCT can help identify this.

Associated Microphthalmia

ONH may occasionally coexist with:

Microphthalmia
Other congenital ocular abnormalities

Nystagmus

Nystagmus is common in:

Bilateral ONH
Severe visual impairment

It usually reflects impaired early visual input.

Strabismus

Strabismus is common, especially in:

Unilateral ONH
Asymmetric bilateral disease

It may contribute additional amblyopic visual loss.

Pupils

A RAPD may be present with:

Unilateral ONH
Markedly asymmetric bilateral ONH

Visual Fields

When reliable testing becomes possible, defects may include:

Generalized constriction
Sectoral defects
Altitudinal defects
Central defects

Superior segmental ONH classically produces:

Inferior visual field loss

OCT

OCT may demonstrate:

Reduced RNFL
Reduced ganglion cell layer
Small optic nerve head

It is useful for:

Structural documentation
Demonstrating asymmetry
Distinguishing ONH from acquired optic atrophy

Interpretation can be limited by pediatric normative databases.

MRI

MRI of the brain and orbits is generally appropriate in children with ONH to assess for:

Pituitary abnormalities
Hypothalamic abnormalities
Midline brain defects
Corpus callosum abnormalities
Cortical migration disorders

MRI Pituitary Findings

Potential findings include:

Pituitary hypoplasia
Absent or abnormal pituitary stalk
Ectopic posterior pituitary bright spot

These increase concern for pituitary hormone deficiency.

However:

A normal MRI does not exclude endocrinopathy.

Important Imaging Principle

MRI can demonstrate associated structural abnormalities, but:

Optic nerve size on neuroimaging correlates imperfectly with visual function.

Clinical examination remains essential.

Endocrine Dysfunction

Pituitary abnormalities are among the most important systemic associations.

Potential deficiencies include:

Growth hormone
ACTH/cortisol
TSH
Gonadotropins
Antidiuretic hormone

Growth Hormone Deficiency

Growth hormone deficiency may present with:

Poor linear growth
Falling height percentiles
Delayed growth velocity

Growth charts should be reviewed longitudinally.

Central Hypothyroidism

Central hypothyroidism may be present despite:

Normal or low-normal TSH

Therefore:

Free T4 is essential

and TSH alone is insufficient to screen for central hypothyroidism.

ACTH Deficiency

ACTH deficiency may cause:

Hypoglycemia
Hypotension
Lethargy
Adrenal crisis

This is potentially:

Life-threatening

and must not be missed.

Diabetes Insipidus

Central diabetes insipidus may produce:

Polyuria
Polydipsia
Hypernatremia

Further testing may include:

Serum sodium
Serum osmolality
Urine osmolality

Endocrine Evaluation

A low threshold for pediatric endocrinology referral is appropriate.

Initial assessment may include:

Free T4
TSH
Morning cortisol
Glucose
IGF-1
IGFBP-3
Electrolytes

Additional testing depends on:

Age
Growth pattern
Pubertal status
Clinical symptoms

Long-Term Endocrine Surveillance

A normal endocrine evaluation in infancy does not guarantee normal future pituitary function.

Hormonal abnormalities may emerge later.

Therefore monitor:

Height
Weight
Growth velocity
Puberty
Symptoms of adrenal or thyroid dysfunction

Neurologic Associations

Possible abnormalities include:

Corpus callosum hypoplasia
Agenesis of the corpus callosum
Cortical ectopia
Pachygyria
Schizencephaly
Other migration abnormalities
Seizure disorders

Developmental Delay

Developmental problems are more common with:

Bilateral disease
Severe visual impairment
Cerebral abnormalities
Pituitary dysfunction

Assessment may include:

Developmental pediatrics
Neurology
Early-intervention services

Differential Diagnosis

Important differentials include:

Optic atrophy
High hyperopia with small crowded discs
Tilted optic disc
Optic nerve coloboma
Peripapillary staphyloma
Peripapillary atrophy
Morning glory disc anomaly

ONH vs Optic Atrophy

Optic Nerve Hypoplasia

Congenitally small disc
Double-ring sign
Nonprogressive
Reduced axon number from development

Optic Atrophy

Acquired axonal loss
Usually normal-sized disc initially
Pallor predominates
History may reveal previous neurologic or ocular injury

Treatment

There is:

No treatment that can regenerate the hypoplastic optic nerve

Management focuses on maximizing existing visual function and treating associated systemic disease.

Refractive Correction

Perform cycloplegic refraction and correct:

Hyperopia
Myopia
Astigmatism
Anisometropia

Optimal refractive correction is important during visual development.

Amblyopia Treatment

Amblyopia may coexist with structural optic nerve disease.

Treat when appropriate with:

Optical correction
Patching
Atropine penalization in selected cases

Therapy should be individualized according to visual potential.

Strabismus

Management may include:

Refractive correction
Amblyopia treatment
Strabismus surgery

Surgery may improve:

Alignment
Cosmesis
Binocular function when sufficient vision exists

Nystagmus

Nystagmus surgery may be considered selectively for:

Significant abnormal head posture
Null point
Associated strabismus

It does not treat the underlying optic nerve abnormality.

Protective Eyewear

When visual function is markedly asymmetric:

Protective spectacles should be recommended for the better-seeing eye.

Low-Vision Support

Children with significant bilateral visual impairment should be referred early for:

Low-vision assessment
Early-intervention programs
Educational support
Orientation and mobility training
Adaptive technology

Endocrine Treatment

Hormone replacement is directed by pediatric endocrinology.

Examples include:

Hydrocortisone for adrenal insufficiency
Levothyroxine for central hypothyroidism
Growth hormone when appropriate
Desmopressin for diabetes insipidus

Genetic Counseling

Genetic consultation may be useful in:

Bilateral severe disease
Syndromic cases
Multiple congenital anomalies
Family history
Suspected HESX1/SOX-related disease

Stem Cell Therapy

There is currently:

No convincing scientific evidence that stem cell treatment restores visual function in ONH.

It is not an established therapy.

Follow-Up

Ongoing ophthalmic follow-up should assess:

Visual acuity
Refraction
Amblyopia
Strabismus
Nystagmus
Functional visual development

Children often require more frequent review during:

Amblyopia treatment
Early visual development

Growth and Development Monitoring

Longitudinal monitoring should include:

Height
Weight
Growth velocity
Puberty
Developmental milestones
Neurologic symptoms

Prognosis

Visual prognosis is:

Highly variable

and depends primarily on residual optic nerve function.

Disc appearance and MRI findings correlate only poorly with visual outcome.

Stability

ONH itself is generally:

Nonprogressive

Apparent visual improvement with age may occur because of:

Visual maturation
Improved fixation
Amblyopia treatment
Better testing cooperation

This does not represent optic nerve regeneration.

Complications

Potential complications include:

Severe visual impairment
Amblyopia
Strabismus
Nystagmus
Developmental delay
Seizures
Growth hormone deficiency
Central hypothyroidism
ACTH deficiency
Diabetes insipidus
Pubertal abnormalities

Ophthalmology Pearls

Pediatric optic nerve hypoplasia is a congenital, nonprogressive reduction in optic nerve axons.
The classic fundus finding is a small optic disc with a double-ring sign.
Bilateral ONH often presents with poor visual behavior and nystagmus; unilateral disease often presents with strabismus or failed screening.
Visual function correlates poorly with optic disc size or MRI appearance.
The most important systemic association is hypothalamic-pituitary dysfunction.
Free T4 is essential because central hypothyroidism may occur with a normal or low-normal TSH.
ACTH/cortisol deficiency can be life-threatening and should not be missed.
A normal MRI does not exclude pituitary dysfunction.
Endocrine abnormalities may appear later, so longitudinal growth and hormonal surveillance is important.
SOD does not require all three classic findings; ONH, pituitary dysfunction, and midline brain abnormalities may occur in different combinations.
Maternal diabetes is associated with superior segmental ONH (“topless disc”), which typically causes an inferior visual field defect.
Treatment focuses on refractive correction, amblyopia therapy, strabismus care, endocrine treatment, developmental support, and low-vision rehabilitation.
There is currently no proven regenerative or stem-cell treatment for ONH.

Septo-Optic Dysplasia Septo-optic dysplasia (SOD) traditionally refers to the presence of at least two of the following: Optic nerve hypoplasia Pituitary hormone dysfunction Midline brain abnormality Midline abnormalities may include: Absent septum pellucidum Corpus callosum hypoplasia or agenesis The term de Morsier syndrome is historical. Importantly: Absence of the septum pellucidum alone does not predict endocrine dysfunction, and significant endocrinopathy can occur even with otherwise normal MRI findings.

Epidemiology ONH is among the most common congenital optic nerve abnormalities in children. Most cases are: Sporadic Bilateral involvement is common, but unilateral disease is frequently encountered.

Risk Factors Most children have no clearly identifiable prenatal cause. Reported associations include: Maternal alcohol exposure Young maternal age Prematurity Abnormal fetal growth Maternal diabetes Certain prenatal medication or drug exposures Older literature has reported associations with: Some anticonvulsants Quinine PCP LSD but these associations are not consistently established.

Maternal Diabetes Maternal diabetes is particularly associated with: Superior segmental optic nerve hypoplasia also called: Topless disc syndrome This causes: Superior disc hypoplasia Superior RNFL loss Corresponding inferior visual field defect

Genetics Most ONH is sporadic. Rare genetic associations include abnormalities involving: HESX1 SOX2 SOX3 OTX2 PAX6 Other genes involved in forebrain and pituitary development Genetic evaluation is especially appropriate when there is: Bilateral severe ONH Syndromic appearance Multiple congenital anomalies Strong family history Pituitary abnormalities

Associated Genetic and Developmental Disorders ONH may occur with: Aniridia Albinism Midline developmental syndromes Pituitary developmental abnormalities Cortical migration disorders Congenital infection and prenatal cerebral injury may also coexist with optic nerve hypoplasia-like appearances.

Pathophysiology The primary abnormality is: Reduced number of optic nerve axons Possible mechanisms include: Abnormal retinal ganglion cell differentiation Excessive developmental apoptosis Abnormal axonal guidance Prenatal injury to the developing visual system The outer retinal layers are generally preserved unless another retinal disorder is present.

Pathology Histologically there is: Reduced retinal ganglion cell population Reduced RNFL Reduced optic nerve axons Small optic nerve caliber

Clinical Presentation Bilateral ONH Usually presents early with: Poor visual behavior Poor fixation Nystagmus Developmental concerns Nystagmus often appears during the first few months of life.

Unilateral ONH May present later with: Strabismus Amblyopia Failed vision screening Incidental optic disc abnormality A child with unilateral ONH may otherwise be systemically normal.

Visual Acuity Visual function is highly variable. It may range from: 20/20 to profound visual impairment A key principle: Disc appearance correlates poorly with visual function. A very small optic nerve may retain useful vision, while a mildly hypoplastic nerve may function poorly.

History Ask about: Poor fixation Nystagmus Strabismus Developmental delay Seizures Abnormal growth Hypoglycemia Prolonged neonatal jaundice Excessive thirst or urination Prenatal alcohol or medication exposure Maternal diabetes Family history of developmental or endocrine disease

Endocrine Warning Signs Important clues to pituitary dysfunction include: Neonatal hypoglycemia Prolonged jaundice Poor growth Failure to thrive Micropenis Cryptorchidism Recurrent seizures Polyuria/polydipsia Abnormal puberty These findings warrant urgent endocrine assessment.

Physical Examination Perform a complete pediatric ophthalmic examination including: Age-appropriate visual acuity Pupils Ocular alignment Motility Cycloplegic refraction Slit-lamp examination Dilated fundus examination

Optic Disc Appearance Classic findings include: Small optic disc Pale or gray disc Reduced neuroretinal tissue Double-ring sign

Double-Ring Sign The double-ring sign consists of: Small true optic nerve Surrounding larger ring corresponding to the normal-sized scleral canal and adjacent tissue It is one of the classic signs of ONH.

Disc–Macula Relationship Because the optic disc is abnormally small, the distance from: Disc center Fovea appears disproportionately large compared with disc diameter. A reduced disc diameter-to-disc–macula distance ratio supports the diagnosis.

Retinal Vessels Associated features may include: Relative vessel crowding Tortuosity Immature vascular pattern These findings are supportive but not diagnostic.

Foveal Hypoplasia Some children with ONH may have associated: Foveal hypoplasia particularly when there is an underlying developmental or syndromic disorder. OCT can help identify this.

Associated Microphthalmia ONH may occasionally coexist with: Microphthalmia Other congenital ocular abnormalities

Nystagmus Nystagmus is common in: Bilateral ONH Severe visual impairment It usually reflects impaired early visual input.

Strabismus Strabismus is common, especially in: Unilateral ONH Asymmetric bilateral disease It may contribute additional amblyopic visual loss.

Pupils A RAPD may be present with: Unilateral ONH Markedly asymmetric bilateral ONH

Visual Fields When reliable testing becomes possible, defects may include: Generalized constriction Sectoral defects Altitudinal defects Central defects Superior segmental ONH classically produces: Inferior visual field loss

OCT OCT may demonstrate: Reduced RNFL Reduced ganglion cell layer Small optic nerve head It is useful for: Structural documentation Demonstrating asymmetry Distinguishing ONH from acquired optic atrophy Interpretation can be limited by pediatric normative databases.

MRI MRI of the brain and orbits is generally appropriate in children with ONH to assess for: Pituitary abnormalities Hypothalamic abnormalities Midline brain defects Corpus callosum abnormalities Cortical migration disorders

MRI Pituitary Findings Potential findings include: Pituitary hypoplasia Absent or abnormal pituitary stalk Ectopic posterior pituitary bright spot These increase concern for pituitary hormone deficiency. However: A normal MRI does not exclude endocrinopathy.

Important Imaging Principle MRI can demonstrate associated structural abnormalities, but: Optic nerve size on neuroimaging correlates imperfectly with visual function. Clinical examination remains essential.

Endocrine Dysfunction Pituitary abnormalities are among the most important systemic associations. Potential deficiencies include: Growth hormone ACTH/cortisol TSH Gonadotropins Antidiuretic hormone

Growth Hormone Deficiency Growth hormone deficiency may present with: Poor linear growth Falling height percentiles Delayed growth velocity Growth charts should be reviewed longitudinally.

Central Hypothyroidism Central hypothyroidism may be present despite: Normal or low-normal TSH Therefore: Free T4 is essential and TSH alone is insufficient to screen for central hypothyroidism.

ACTH Deficiency ACTH deficiency may cause: Hypoglycemia Hypotension Lethargy Adrenal crisis This is potentially: Life-threatening and must not be missed.

Diabetes Insipidus Central diabetes insipidus may produce: Polyuria Polydipsia Hypernatremia Further testing may include: Serum sodium Serum osmolality Urine osmolality

Endocrine Evaluation A low threshold for pediatric endocrinology referral is appropriate. Initial assessment may include: Free T4 TSH Morning cortisol Glucose IGF-1 IGFBP-3 Electrolytes Additional testing depends on: Age Growth pattern Pubertal status Clinical symptoms

Long-Term Endocrine Surveillance A normal endocrine evaluation in infancy does not guarantee normal future pituitary function. Hormonal abnormalities may emerge later. Therefore monitor: Height Weight Growth velocity Puberty Symptoms of adrenal or thyroid dysfunction

Neurologic Associations Possible abnormalities include: Corpus callosum hypoplasia Agenesis of the corpus callosum Cortical ectopia Pachygyria Schizencephaly Other migration abnormalities Seizure disorders

Developmental Delay Developmental problems are more common with: Bilateral disease Severe visual impairment Cerebral abnormalities Pituitary dysfunction Assessment may include: Developmental pediatrics Neurology Early-intervention services

Differential Diagnosis Important differentials include: Optic atrophy High hyperopia with small crowded discs Tilted optic disc Optic nerve coloboma Peripapillary staphyloma Peripapillary atrophy Morning glory disc anomaly

ONH vs Optic Atrophy Optic Nerve Hypoplasia Congenitally small disc Double-ring sign Nonprogressive Reduced axon number from development Optic Atrophy Acquired axonal loss Usually normal-sized disc initially Pallor predominates History may reveal previous neurologic or ocular injury

Treatment There is: No treatment that can regenerate the hypoplastic optic nerve Management focuses on maximizing existing visual function and treating associated systemic disease.

Refractive Correction Perform cycloplegic refraction and correct: Hyperopia Myopia Astigmatism Anisometropia Optimal refractive correction is important during visual development.

Amblyopia Treatment Amblyopia may coexist with structural optic nerve disease. Treat when appropriate with: Optical correction Patching Atropine penalization in selected cases Therapy should be individualized according to visual potential.

Strabismus Management may include: Refractive correction Amblyopia treatment Strabismus surgery Surgery may improve: Alignment Cosmesis Binocular function when sufficient vision exists

Nystagmus Nystagmus surgery may be considered selectively for: Significant abnormal head posture Null point Associated strabismus It does not treat the underlying optic nerve abnormality.

Protective Eyewear When visual function is markedly asymmetric: Protective spectacles should be recommended for the better-seeing eye.

Low-Vision Support Children with significant bilateral visual impairment should be referred early for: Low-vision assessment Early-intervention programs Educational support Orientation and mobility training Adaptive technology

Endocrine Treatment Hormone replacement is directed by pediatric endocrinology. Examples include: Hydrocortisone for adrenal insufficiency Levothyroxine for central hypothyroidism Growth hormone when appropriate Desmopressin for diabetes insipidus

Genetic Counseling Genetic consultation may be useful in: Bilateral severe disease Syndromic cases Multiple congenital anomalies Family history Suspected HESX1/SOX-related disease

Stem Cell Therapy There is currently: No convincing scientific evidence that stem cell treatment restores visual function in ONH. It is not an established therapy.

Follow-Up Ongoing ophthalmic follow-up should assess: Visual acuity Refraction Amblyopia Strabismus Nystagmus Functional visual development Children often require more frequent review during: Amblyopia treatment Early visual development

Growth and Development Monitoring Longitudinal monitoring should include: Height Weight Growth velocity Puberty Developmental milestones Neurologic symptoms

Prognosis Visual prognosis is: Highly variable and depends primarily on residual optic nerve function. Disc appearance and MRI findings correlate only poorly with visual outcome.

Stability ONH itself is generally: Nonprogressive Apparent visual improvement with age may occur because of: Visual maturation Improved fixation Amblyopia treatment Better testing cooperation This does not represent optic nerve regeneration.

Complications Potential complications include: Severe visual impairment Amblyopia Strabismus Nystagmus Developmental delay Seizures Growth hormone deficiency Central hypothyroidism ACTH deficiency Diabetes insipidus Pubertal abnormalities

Ophthalmology Pearls Pediatric optic nerve hypoplasia is a congenital, nonprogressive reduction in optic nerve axons. The classic fundus finding is a small optic disc with a double-ring sign. Bilateral ONH often presents with poor visual behavior and nystagmus; unilateral disease often presents with strabismus or failed screening. Visual function correlates poorly with optic disc size or MRI appearance. The most important systemic association is hypothalamic-pituitary dysfunction. Free T4 is essential because central hypothyroidism may occur with a normal or low-normal TSH. ACTH/cortisol deficiency can be life-threatening and should not be missed. A normal MRI does not exclude pituitary dysfunction. Endocrine abnormalities may appear later, so longitudinal growth and hormonal surveillance is important. SOD does not require all three classic findings; ONH, pituitary dysfunction, and midline brain abnormalities may occur in different combinations. Maternal diabetes is associated with superior segmental ONH (“topless disc”), which typically causes an inferior visual field defect. Treatment focuses on refractive correction, amblyopia therapy, strabismus care, endocrine treatment, developmental support, and low-vision rehabilitation. There is currently no proven regenerative or stem-cell treatment for ONH.

Published on: September 20, 2026

Ophthalmology – Pattern Dystrophy

Ophthalmology – Pattern Dystrophy

Basics

Description

Pattern dystrophies of the retinal pigment epithelium (RPE) are a heterogeneous group of inherited macular disorders characterized by abnormal deposition of lipofuscin and pigment at the level of the:

RPE
Photoreceptor–RPE interface

They are usually:

Bilateral
Slowly progressive
Relatively symmetric

but the appearance can differ between the two eyes.

Many patients are discovered incidentally and retain useful central vision for decades.

Major Clinical Patterns

Classically described phenotypes include:

Butterfly-shaped pattern dystrophy
Reticular pattern dystrophy
Adult-onset foveomacular vitelliform lesion/dystrophy
Fundus pulverulentus
Multifocal pattern dystrophy simulating fundus flavimaculatus

These categories overlap considerably.

A single patient may:

Change phenotype over time
Show different patterns between eyes
Develop increasing RPE atrophy with age

Epidemiology

The true incidence and prevalence are uncertain because of:

Mild symptoms
Variable phenotype
Overlap with age-related macular disease
Variable penetrance

Men and women are affected approximately equally.

Presentation is often in:

Young or middle adulthood

although clinically significant symptoms may not appear until later life.

Genetics

Most classic pattern dystrophies are inherited in an:

Autosomal dominant

fashion.

The most important gene is:

PRPH2

formerly called:

RDS/peripherin

PRPH2 is located on chromosome 6 and encodes a photoreceptor outer-segment membrane protein important for:

Disc structure
Photoreceptor maintenance

PRPH2 Phenotypic Variability

PRPH2 variants can produce a wide spectrum of retinal disease, including:

Pattern dystrophy
Adult-onset vitelliform lesions
Central areolar choroidal dystrophy
Cone–rod dystrophy
Retinitis pigmentosa-like phenotypes

Therefore:

The same gene can produce markedly different retinal appearances even within the same family.

Other Genetic Associations

Not all pattern dystrophy phenotypes are caused by PRPH2.

Other implicated genes include:

BEST1
IMPG1
IMPG2

depending on phenotype.

Genetic testing is most useful when:

Diagnosis is uncertain
Family counseling is needed
Presentation is atypical
There is overlap with another inherited retinal disease

Mitochondrial Association

A distinctive macular pattern dystrophy is strongly associated with:

Maternally inherited diabetes and deafness (MIDD)

usually caused by the mitochondrial DNA variant:

m.3243A>G in MT-TL1

The macular phenotype may show:

Circumferential RPE atrophy
Pigmentary changes surrounding the fovea
Relative foveal sparing early

MIDD Clinical Clues

Consider MIDD when pattern dystrophy occurs with:

Diabetes mellitus
Sensorineural hearing loss
Maternal inheritance pattern
Short stature
Other mitochondrial features

Because mitochondrial DNA is maternally inherited:

Affected fathers do not transmit the disorder, whereas affected mothers may transmit it to offspring.

Pathophysiology

Pattern dystrophies involve abnormal function of:

Photoreceptor outer segments
RPE

with accumulation of:

Lipofuscin and other pigmentary material

Over time this may lead to:

RPE degeneration
Photoreceptor loss
Outer retinal atrophy

Complications of Progressive Disease

With age, patients may develop:

Geographic-like RPE atrophy
Photoreceptor loss
Central visual decline
Macular neovascularization (MNV/CNV)

Clinical Presentation

Many patients are initially:

Asymptomatic

When symptoms occur they may include:

Mild reduction in central vision
Metamorphopsia
Difficulty reading
Central scotoma
Reduced contrast sensitivity

Symptoms usually progress slowly.

Fundus Appearance

Typical fundus findings include:

Yellow
Gray
Orange
Brown

pigmentary deposits at the macula.

The distribution varies according to phenotype.

Butterfly Pattern Dystrophy

Characteristic finding:

Butterfly- or spoke-shaped pigmentary material centered on the fovea

The lesion consists of:

Yellow-gray material
Pigment clumping
RPE alteration

Reticular Pattern Dystrophy

Shows:

Reticular
Net-like
Branching pigment pattern

typically around the posterior pole.

Adult-Onset Foveomacular Vitelliform Phenotype

Usually demonstrates a:

Round or oval yellow subfoveal vitelliform lesion

It may resemble:

Best disease
Acquired vitelliform lesion
Early AMD

Patients often present in:

Middle or later adulthood

Fundus Pulverulentus

Characterized by:

Numerous fine
Dust-like
Gray-white or pigmentary macular spots

The changes are usually subtle.

Multifocal Pattern Dystrophy

May produce multiple:

Yellow-white flecks
Pigmentary lesions

and can resemble:

Stargardt disease / fundus flavimaculatus

Visual Acuity

Visual acuity is often:

Normal
Mildly reduced

for many years.

Substantial loss usually occurs because of:

Central RPE atrophy
Photoreceptor loss
MNV/CNV

Color Vision

Color vision is usually:

Normal early

Abnormality may occur with advanced macular or cone dysfunction.

Visual Fields

Visual fields are often normal early.

Advanced disease may produce:

Central scotoma
Paracentral scotoma

Dark Adaptation

Dark adaptation is usually:

Normal or minimally affected

which helps distinguish many pattern dystrophies from more diffuse retinal dystrophies.

OCT

Optical coherence tomography is one of the most useful investigations.

Findings may include:

Hyperreflective material between RPE and photoreceptors
Subretinal vitelliform material
RPE irregularity
Ellipsoid-zone disruption
Outer retinal thinning
RPE atrophy

OCT in Vitelliform Lesions

The yellow lesion usually corresponds to:

Hyperreflective subretinal material above the RPE

Later stages may show:

Collapse of material
Outer retinal disruption
RPE atrophy

Fundus Autofluorescence

FAF is particularly useful because lipofuscin is autofluorescent.

Early lesions often demonstrate:

Increased autofluorescence

because of accumulated lipofuscin.

Areas of advanced RPE loss demonstrate:

Reduced or absent autofluorescence

Fluorescein Angiography

FA findings vary with the pattern.

Pigmented areas may cause:

Blocked fluorescence

Areas of RPE atrophy may produce:

Window defects
Hyperfluorescence without leakage

FA is particularly useful when:

MNV/CNV is suspected

OCT Angiography

OCTA may detect:

Neovascular networks
Subclinical MNV

without dye injection.

It is particularly helpful when:

Fluid or hemorrhage is suspicious for neovascularization
Structural OCT findings are equivocal

Electroretinography

Full-field ERG is usually:

Normal

because the disease is predominantly macular.

An abnormal full-field ERG should raise suspicion for:

Cone dystrophy
Cone–rod dystrophy
More generalized inherited retinal disease

Electrooculography

EOG may be:

Normal
Mildly reduced

It is not routinely needed for diagnosis.

Diagnosis

Diagnosis is based on:

Characteristic fundus appearance
OCT
Fundus autofluorescence
Family history

Additional testing is directed by phenotype.

When Genetic Testing Is Helpful

Consider testing when:

PRPH2-associated disease is suspected
There is a strong family history
MIDD is suspected
Diagnosis overlaps with Best disease or Stargardt disease
Counseling is needed

Differential Diagnosis

Important differentials include:

Age-related macular degeneration
Stargardt disease
Best vitelliform macular dystrophy
Acquired vitelliform lesion
Dominant drusen
Central areolar choroidal dystrophy
Cone dystrophy
Benign concentric annular macular dystrophy
Drug toxicity
Chronic central serous chorioretinopathy

Pattern Dystrophy vs AMD

This distinction becomes particularly important in older patients.

Pattern dystrophy tends to show:

Characteristic geometric or patterned pigment
Family history
Relatively preserved vision for age
Bilateral similar lesions
Hyperautofluorescent lipofuscin

AMD more typically shows:

Drusen
Pigmentary changes without a characteristic pattern
Geographic atrophy
Age-related macular neovascularization

The two may coexist.

Pattern Dystrophy vs Stargardt Disease

Stargardt disease typically has:

Younger onset
More progressive central visual loss
Flecks extending beyond the macula
Characteristic FAF changes
ABCA4-associated inheritance

Pattern dystrophy is more often:

Autosomal dominant
Later onset
Milder

Adult-Onset Vitelliform Lesion vs Best Disease

Best disease usually:

Begins earlier
Has BEST1-associated inheritance
Shows abnormal EOG in classic disease

Adult-onset vitelliform lesions:

Present later
Are generally smaller
Have more limited visual effect early
May be associated with PRPH2, BEST1, IMPG1, or IMPG2

Treatment

There is currently:

No treatment that reverses the underlying inherited RPE dystrophy

Management focuses on:

Monitoring
Treating complications
Genetic counseling
Low-vision support when necessary

Macular Neovascularization

The most important treatable complication is:

MNV/CNV

Suspect it when there is:

Sudden visual decline
New metamorphopsia
New hemorrhage
Intraretinal or subretinal fluid on OCT

Anti-VEGF Therapy

The modern first-line treatment for active MNV/CNV is:

Intravitreal anti-VEGF therapy

Agents include:

Bevacizumab
Ranibizumab
Aflibercept
Faricimab in selected settings

Treatment generally follows OCT-guided disease activity.

Photodynamic Therapy

PDT was historically used for CNV associated with pattern dystrophy.

Today it has largely been replaced by:

Anti-VEGF therapy

because anti-VEGF generally provides better anatomic and visual outcomes.

Monitoring

Patients without complications may be reviewed:

Approximately annually

depending on:

Age
Phenotype
Visual symptoms
Degree of atrophy

Home Monitoring

Patients should be advised to report:

New distortion
New central blur
New scotoma

An:

Amsler grid

may be useful for home monitoring.

Low-Vision Rehabilitation

Referral is appropriate when central atrophy causes:

Reading difficulty
Reduced contrast sensitivity
Loss of useful central vision

Genetic Counseling

Counseling should address:

Autosomal dominant inheritance in many PRPH2 cases
Variable expression
Incomplete penetrance in some families
Mitochondrial inheritance when MIDD is present

Prognosis

Overall visual prognosis is generally:

Good

Most patients retain useful central vision for many years.

Many maintain:

Reading vision
Functional independence

into late adulthood.

Poorer Prognostic Factors

More significant visual loss occurs with:

Extensive RPE atrophy
Foveal photoreceptor loss
MNV/CNV
Recurrent macular hemorrhage

Complications

Important complications include:

Progressive central visual loss
RPE atrophy
Photoreceptor loss
Central scotoma
Macular neovascularization
Subretinal hemorrhage

Ophthalmology Pearls

Pattern dystrophy is a group of inherited macular RPE disorders characterized by patterned lipofuscin and pigment deposition.
Most classic cases are autosomal dominant and associated with PRPH2, formerly called RDS/peripherin.
The phenotype can change with age and may differ between the two eyes or among members of the same family.
Important patterns include butterfly, reticular, adult-onset vitelliform, fundus pulverulentus, and multifocal pattern dystrophy.
OCT commonly shows subretinal or RPE-level hyperreflective material with outer retinal disruption.
FAF is often hyperautofluorescent early from lipofuscin accumulation and becomes hypoautofluorescent where RPE atrophy develops.
Full-field ERG is usually normal, reflecting the predominantly macular nature of the disease.
MIDD should be considered when pattern dystrophy accompanies diabetes and sensorineural deafness, particularly with maternal inheritance.
Pattern dystrophy can mimic AMD, Stargardt disease, and Best disease.
Most patients retain useful vision for decades.
The major treatable complication is macular neovascularization, for which intravitreal anti-VEGF is first-line therapy.
New metamorphopsia, hemorrhage, or sudden visual loss should prompt urgent OCT assessment for MNV/CNV.

Major Clinical Patterns Classically described phenotypes include: Butterfly-shaped pattern dystrophy Reticular pattern dystrophy Adult-onset foveomacular vitelliform lesion/dystrophy Fundus pulverulentus Multifocal pattern dystrophy simulating fundus flavimaculatus These categories overlap considerably. A single patient may: Change phenotype over time Show different patterns between eyes Develop increasing RPE atrophy with age

Epidemiology The true incidence and prevalence are uncertain because of: Mild symptoms Variable phenotype Overlap with age-related macular disease Variable penetrance Men and women are affected approximately equally. Presentation is often in: Young or middle adulthood although clinically significant symptoms may not appear until later life.

Genetics Most classic pattern dystrophies are inherited in an: Autosomal dominant fashion. The most important gene is: PRPH2 formerly called: RDS/peripherin PRPH2 is located on chromosome 6 and encodes a photoreceptor outer-segment membrane protein important for: Disc structure Photoreceptor maintenance

PRPH2 Phenotypic Variability PRPH2 variants can produce a wide spectrum of retinal disease, including: Pattern dystrophy Adult-onset vitelliform lesions Central areolar choroidal dystrophy Cone–rod dystrophy Retinitis pigmentosa-like phenotypes Therefore: The same gene can produce markedly different retinal appearances even within the same family.

Other Genetic Associations Not all pattern dystrophy phenotypes are caused by PRPH2. Other implicated genes include: BEST1 IMPG1 IMPG2 depending on phenotype. Genetic testing is most useful when: Diagnosis is uncertain Family counseling is needed Presentation is atypical There is overlap with another inherited retinal disease

Mitochondrial Association A distinctive macular pattern dystrophy is strongly associated with: Maternally inherited diabetes and deafness (MIDD) usually caused by the mitochondrial DNA variant: m.3243A>G in MT-TL1 The macular phenotype may show: Circumferential RPE atrophy Pigmentary changes surrounding the fovea Relative foveal sparing early

MIDD Clinical Clues Consider MIDD when pattern dystrophy occurs with: Diabetes mellitus Sensorineural hearing loss Maternal inheritance pattern Short stature Other mitochondrial features Because mitochondrial DNA is maternally inherited: Affected fathers do not transmit the disorder, whereas affected mothers may transmit it to offspring.

Pathophysiology Pattern dystrophies involve abnormal function of: Photoreceptor outer segments RPE with accumulation of: Lipofuscin and other pigmentary material Over time this may lead to: RPE degeneration Photoreceptor loss Outer retinal atrophy

Complications of Progressive Disease With age, patients may develop: Geographic-like RPE atrophy Photoreceptor loss Central visual decline Macular neovascularization (MNV/CNV)

Clinical Presentation Many patients are initially: Asymptomatic When symptoms occur they may include: Mild reduction in central vision Metamorphopsia Difficulty reading Central scotoma Reduced contrast sensitivity Symptoms usually progress slowly.

Fundus Appearance Typical fundus findings include: Yellow Gray Orange Brown pigmentary deposits at the macula. The distribution varies according to phenotype.

Butterfly Pattern Dystrophy Characteristic finding: Butterfly- or spoke-shaped pigmentary material centered on the fovea The lesion consists of: Yellow-gray material Pigment clumping RPE alteration

Reticular Pattern Dystrophy Shows: Reticular Net-like Branching pigment pattern typically around the posterior pole.

Adult-Onset Foveomacular Vitelliform Phenotype Usually demonstrates a: Round or oval yellow subfoveal vitelliform lesion It may resemble: Best disease Acquired vitelliform lesion Early AMD Patients often present in: Middle or later adulthood

Fundus Pulverulentus Characterized by: Numerous fine Dust-like Gray-white or pigmentary macular spots The changes are usually subtle.

Multifocal Pattern Dystrophy May produce multiple: Yellow-white flecks Pigmentary lesions and can resemble: Stargardt disease / fundus flavimaculatus

Visual Acuity Visual acuity is often: Normal Mildly reduced for many years. Substantial loss usually occurs because of: Central RPE atrophy Photoreceptor loss MNV/CNV

Color Vision Color vision is usually: Normal early Abnormality may occur with advanced macular or cone dysfunction.

Visual Fields Visual fields are often normal early. Advanced disease may produce: Central scotoma Paracentral scotoma

Dark Adaptation Dark adaptation is usually: Normal or minimally affected which helps distinguish many pattern dystrophies from more diffuse retinal dystrophies.

OCT Optical coherence tomography is one of the most useful investigations. Findings may include: Hyperreflective material between RPE and photoreceptors Subretinal vitelliform material RPE irregularity Ellipsoid-zone disruption Outer retinal thinning RPE atrophy

OCT in Vitelliform Lesions The yellow lesion usually corresponds to: Hyperreflective subretinal material above the RPE Later stages may show: Collapse of material Outer retinal disruption RPE atrophy

Fundus Autofluorescence FAF is particularly useful because lipofuscin is autofluorescent. Early lesions often demonstrate: Increased autofluorescence because of accumulated lipofuscin. Areas of advanced RPE loss demonstrate: Reduced or absent autofluorescence

Fluorescein Angiography FA findings vary with the pattern. Pigmented areas may cause: Blocked fluorescence Areas of RPE atrophy may produce: Window defects Hyperfluorescence without leakage FA is particularly useful when: MNV/CNV is suspected

OCT Angiography OCTA may detect: Neovascular networks Subclinical MNV without dye injection. It is particularly helpful when: Fluid or hemorrhage is suspicious for neovascularization Structural OCT findings are equivocal

Electroretinography Full-field ERG is usually: Normal because the disease is predominantly macular. An abnormal full-field ERG should raise suspicion for: Cone dystrophy Cone–rod dystrophy More generalized inherited retinal disease

Electrooculography EOG may be: Normal Mildly reduced It is not routinely needed for diagnosis.

Diagnosis Diagnosis is based on: Characteristic fundus appearance OCT Fundus autofluorescence Family history Additional testing is directed by phenotype.

When Genetic Testing Is Helpful Consider testing when: PRPH2-associated disease is suspected There is a strong family history MIDD is suspected Diagnosis overlaps with Best disease or Stargardt disease Counseling is needed

Differential Diagnosis Important differentials include: Age-related macular degeneration Stargardt disease Best vitelliform macular dystrophy Acquired vitelliform lesion Dominant drusen Central areolar choroidal dystrophy Cone dystrophy Benign concentric annular macular dystrophy Drug toxicity Chronic central serous chorioretinopathy

Pattern Dystrophy vs AMD This distinction becomes particularly important in older patients. Pattern dystrophy tends to show: Characteristic geometric or patterned pigment Family history Relatively preserved vision for age Bilateral similar lesions Hyperautofluorescent lipofuscin AMD more typically shows: Drusen Pigmentary changes without a characteristic pattern Geographic atrophy Age-related macular neovascularization The two may coexist.

Pattern Dystrophy vs Stargardt Disease Stargardt disease typically has: Younger onset More progressive central visual loss Flecks extending beyond the macula Characteristic FAF changes ABCA4-associated inheritance Pattern dystrophy is more often: Autosomal dominant Later onset Milder

Adult-Onset Vitelliform Lesion vs Best Disease Best disease usually: Begins earlier Has BEST1-associated inheritance Shows abnormal EOG in classic disease Adult-onset vitelliform lesions: Present later Are generally smaller Have more limited visual effect early May be associated with PRPH2, BEST1, IMPG1, or IMPG2

Treatment There is currently: No treatment that reverses the underlying inherited RPE dystrophy Management focuses on: Monitoring Treating complications Genetic counseling Low-vision support when necessary

Macular Neovascularization The most important treatable complication is: MNV/CNV Suspect it when there is: Sudden visual decline New metamorphopsia New hemorrhage Intraretinal or subretinal fluid on OCT

Anti-VEGF Therapy The modern first-line treatment for active MNV/CNV is: Intravitreal anti-VEGF therapy Agents include: Bevacizumab Ranibizumab Aflibercept Faricimab in selected settings Treatment generally follows OCT-guided disease activity.

Photodynamic Therapy PDT was historically used for CNV associated with pattern dystrophy. Today it has largely been replaced by: Anti-VEGF therapy because anti-VEGF generally provides better anatomic and visual outcomes.

Monitoring Patients without complications may be reviewed: Approximately annually depending on: Age Phenotype Visual symptoms Degree of atrophy

Home Monitoring Patients should be advised to report: New distortion New central blur New scotoma An: Amsler grid may be useful for home monitoring.

Low-Vision Rehabilitation Referral is appropriate when central atrophy causes: Reading difficulty Reduced contrast sensitivity Loss of useful central vision

Genetic Counseling Counseling should address: Autosomal dominant inheritance in many PRPH2 cases Variable expression Incomplete penetrance in some families Mitochondrial inheritance when MIDD is present

Prognosis Overall visual prognosis is generally: Good Most patients retain useful central vision for many years. Many maintain: Reading vision Functional independence into late adulthood.

Poorer Prognostic Factors More significant visual loss occurs with: Extensive RPE atrophy Foveal photoreceptor loss MNV/CNV Recurrent macular hemorrhage

Complications Important complications include: Progressive central visual loss RPE atrophy Photoreceptor loss Central scotoma Macular neovascularization Subretinal hemorrhage

Ophthalmology Pearls Pattern dystrophy is a group of inherited macular RPE disorders characterized by patterned lipofuscin and pigment deposition. Most classic cases are autosomal dominant and associated with PRPH2, formerly called RDS/peripherin. The phenotype can change with age and may differ between the two eyes or among members of the same family. Important patterns include butterfly, reticular, adult-onset vitelliform, fundus pulverulentus, and multifocal pattern dystrophy. OCT commonly shows subretinal or RPE-level hyperreflective material with outer retinal disruption. FAF is often hyperautofluorescent early from lipofuscin accumulation and becomes hypoautofluorescent where RPE atrophy develops. Full-field ERG is usually normal, reflecting the predominantly macular nature of the disease. MIDD should be considered when pattern dystrophy accompanies diabetes and sensorineural deafness, particularly with maternal inheritance. Pattern dystrophy can mimic AMD, Stargardt disease, and Best disease. Most patients retain useful vision for decades. The major treatable complication is macular neovascularization, for which intravitreal anti-VEGF is first-line therapy. New metamorphopsia, hemorrhage, or sudden visual loss should prompt urgent OCT assessment for MNV/CNV.

Published on: September 20, 2026

Ophthalmology – Papilledema in Children

Ophthalmology – Papilledema in Children

Basics

Description

Papilledema in children is optic disc swelling caused specifically by elevated intracranial pressure (ICP).

It is usually:

Bilateral
Relatively symmetric

but may be:

Markedly asymmetric
Rarely apparently unilateral

Papilledema is a sign of raised ICP, not a diagnosis itself.

In children, important causes include:

Hydrocephalus
Brain tumor
Cerebral venous sinus thrombosis
Meningitis
Craniosynostosis
Shunt malfunction
Idiopathic intracranial hypertension (IIH)

Important Pediatric Principle

In young infants:

Markedly elevated ICP may occur without papilledema

because:

Cranial sutures remain open
Fontanelles can expand
Head circumference may increase rather than pressure being transmitted fully to the optic nerve

Therefore:

Absence of papilledema does not exclude raised ICP in infants or young children.

Epidemiology

The incidence of pediatric papilledema depends on the underlying cause.

Common settings include:

Hydrocephalus
Brain tumors
Craniosynostosis
Cerebral venous sinus thrombosis
IIH

Pediatric IIH differs from adult disease.

Pediatric IIH Demographics

Prepubertal Children

There is:

Less female predominance
Weaker association with obesity

Postpubertal Adolescents

The pattern becomes more similar to adults:

Female predominance
Stronger association with obesity and weight gain

Risk Factors

Risk factors for raised ICP in children include:

Hydrocephalus
Ventricular shunts
Brain tumors
Head trauma
Craniosynostosis
Severe intracranial hemorrhage
Cerebral venous sinus thrombosis

Risk Factors for Pediatric IIH

Associations include:

Obesity, especially after puberty
Recent weight gain
Obstructive sleep apnea
Certain medications

Medications associated with intracranial hypertension include:

Tetracyclines
Vitamin A derivatives / systemic retinoids
Growth hormone
Steroid withdrawal
Lithium in selected cases

The offending medication should be discontinued when clinically appropriate.

Pathophysiology

Elevated ICP is transmitted through the optic nerve subarachnoid space.

This causes:

Increased retrolaminar pressure → impaired axoplasmic transport → optic disc edema

As swelling progresses:

Venous congestion develops
Axons become compressed
Retinal hemorrhages may occur

With prolonged disease:

Retinal ganglion cell axons are lost
Optic atrophy develops
Permanent visual loss may result

Etiology

Important causes include:

Hydrocephalus
Brain tumor
Cerebral venous sinus thrombosis
Meningitis
Encephalitis
Intracranial hemorrhage
Cerebral edema
Craniosynostosis
Shunt malfunction
IIH

Rare causes include:

Spinal tumors
Craniocervical junction lesions
Severe venous outflow obstruction

Hydrocephalus

Hydrocephalus is an important pediatric cause of papilledema.

It may result from:

Obstruction of CSF flow
Impaired CSF absorption
Congenital abnormalities
Tumors
Hemorrhage
Infection

Children with a ventricular shunt remain at risk for:

Shunt malfunction and recurrent elevated ICP

Brain Tumors

Infratentorial tumors are particularly likely to cause raised ICP because they may obstruct:

Fourth ventricle
Cerebral aqueduct
CSF pathways

Symptoms may include:

Morning headache
Vomiting
Ataxia
Cranial nerve palsies

Craniosynostosis

Premature fusion of cranial sutures may restrict skull growth and produce:

Elevated ICP
Papilledema
Optic atrophy
Permanent visual loss

Children with syndromic craniosynostosis require long-term ophthalmic monitoring.

Idiopathic Intracranial Hypertension

Pediatric IIH is raised ICP without:

Intracranial mass
Hydrocephalus
Cerebral venous thrombosis
Abnormal CSF composition
Another identifiable secondary cause

It was historically termed:

Pseudotumor cerebri

History

Ask about:

Headache
Vomiting
Transient visual obscurations
Diplopia
Pulsatile tinnitus
Visual loss
Medication exposure
Recent weight gain
Shunt history
Head trauma
Fever
Neurologic symptoms

Headache

Concerning headache features include:

Awakening from sleep
Present on awakening
Progressive severity
Worsened by coughing or Valsalva
Associated vomiting
Associated diplopia

In a child with known hydrocephalus or a ventricular shunt, a new headache should raise concern for:

Shunt dysfunction or recurrent elevated ICP

Infants and Preverbal Children

They may not report headache.

Possible manifestations include:

Irritability
Lethargy
Somnolence
Poor feeding
Vomiting
Developmental regression
Increasing head circumference
Bulging fontanelle
Abnormal eye movements

Transient Visual Obscurations

Children may report:

Brief blackouts
Graying of vision
Momentary blur

usually lasting:

Seconds

These may occur repeatedly and are often provoked by:

Standing
Bending
Position changes

Diplopia

Diplopia most commonly results from:

Sixth nerve palsy

which may be:

Unilateral
Bilateral

In younger children, CN VI palsy may present as:

New esotropia
Head turn
Failure to abduct one or both eyes

Visual Acuity

In early papilledema:

Central visual acuity may remain normal

This is an important distinction from many other optic neuropathies.

Once significant visual acuity loss develops, axonal injury may already be substantial.

Color Vision

Color vision is often preserved early.

Loss of color vision suggests:

Progressive optic nerve dysfunction
Axonal injury
More advanced disease

Pupils

Pupils are often normal early.

A RAPD may occur when optic nerve damage is:

Asymmetric
Advanced

Fundus Findings

Typical findings include:

Swollen optic discs
Blurred disc margins
RNFL edema
Loss of physiologic cup
Obscuration of vessels crossing the disc margin
Venous engorgement

Disc Hemorrhages

More severe papilledema may cause:

Peripapillary flame hemorrhages
Disc hemorrhages
Cotton-wool spots

Spontaneous Venous Pulsation

Visible spontaneous venous pulsation makes markedly raised ICP less likely.

However:

Absence of venous pulsation is not diagnostic, because it is absent in some normal individuals.

This sign should not be used alone to exclude or confirm intracranial hypertension.

Paton Lines

Paton lines are concentric peripapillary retinal folds caused by optic disc swelling.

They support the presence of significant true disc edema.

Visual Fields

When children are old enough to perform reliable testing, common abnormalities include:

Enlarged blind spot
Nasal defects
Arcuate defects
Peripheral constriction

Advanced disease can produce:

Severe generalized field loss
Central visual loss

Automated Perimetry in Children

Standard automated visual fields may be difficult in young children.

Reliability improves with:

Age
Practice
Shorter strategies
Experienced pediatric technicians

Children younger than approximately school age may require alternative functional assessment.

Chronic Papilledema

Long-standing papilledema can produce:

Disc pallor
RNFL thinning
Gliosis
Optic atrophy
Permanent visual field loss

An atrophic optic nerve may no longer swell significantly even if ICP rises again.

Therefore:

Absence of recurrent papilledema does not reliably exclude shunt malfunction in an optic nerve that is already atrophic.

Diagnostic Approach

The evaluation should answer:

Is the disc truly swollen?
Is the swelling due to raised ICP?
What is causing the raised ICP?

Neuroimaging

Urgent neuroimaging is required for suspected papilledema.

Preferred imaging is:

MRI brain with and without contrast

plus:

MR venography

when feasible.

Why MRV Matters

MRV helps exclude:

Cerebral venous sinus thrombosis

which can occur in children and may mimic IIH.

Risk factors include:

Dehydration
Infection
Inflammatory disease
Hypercoagulable states
Malignancy

CT may be appropriate when:

MRI is unavailable
Emergency imaging is needed
Hydrocephalus or mass effect must be assessed rapidly

However, MRI gives superior evaluation of:

Posterior fossa
Venous sinuses
Infiltrative lesions
Craniovertebral junction

MRI Findings of Raised ICP

Supportive but nonspecific signs include:

Empty or partially empty sella
Enlarged perioptic CSF spaces
Optic nerve tortuosity
Posterior globe flattening
Optic disc protrusion
Venous sinus stenosis

These findings support but do not independently establish IIH.

Lumbar Puncture

After neuroimaging excludes a dangerous mass lesion or obstructive process, LP may be performed.

Evaluate:

Opening pressure
CSF cell count
Protein
Glucose
Additional studies as indicated

Pediatric Opening Pressure

In children, an opening pressure of approximately:

≥28 cm H₂O

is generally considered elevated when measured correctly.

A lower threshold around:

≥25 cm H₂O

may be appropriate in a child who is:

Not obese
Not sedated

Clinical interpretation is essential.

Proper LP Technique

Opening pressure should ideally be measured:

In lateral decubitus position
With the child relaxed
Without excessive Valsalva
Without excessive hip flexion

Sedation can influence measurements.

A single borderline number should not override the overall clinical picture.

OCT

OCT is increasingly valuable in pediatric papilledema.

Assess:

Peripapillary RNFL
Optic nerve head volume
Macular ganglion cell layer

OCT Interpretation

Active papilledema causes:

RNFL thickening

As edema improves:

RNFL thickness falls

However, a fall in RNFL can represent either:

Resolution of edema
Axonal loss

Therefore correlate with:

Ganglion cell layer
Visual acuity
Visual fields

Optic Disc Drusen

The most important cause of pediatric pseudopapilledema is:

Optic disc drusen

Children often have:

Buried drusen
Elevated disc appearance
Indistinct margins

without true increased ICP.

Enhanced-Depth OCT

EDI-OCT can help identify:

Buried optic disc drusen
Hyperreflective calcified deposits

It is increasingly preferred over older ultrasound-only approaches.

B-Scan Ultrasonography

B-scan may demonstrate:

Highly reflective calcified optic disc drusen
Optic nerve sheath enlargement

It remains useful when the diagnosis is uncertain.

Fundus Autofluorescence

Superficial optic disc drusen may show:

Autofluorescence

Buried pediatric drusen may be less detectable.

Differential Diagnosis

Important mimics include:

Optic disc drusen
Crowded hyperopic discs
Tilted optic discs
Myelinated RNFL
Optic neuritis
Neuroretinitis
NAION, rare in children
Infiltrative optic neuropathy
Hypertensive optic disc edema

Papilledema vs Pediatric Optic Neuritis

Papilledema

Usually:

Bilateral
Central acuity preserved early
Symptoms of raised ICP
Enlarged blind spot

Optic Neuritis

More likely:

Significant acuity loss
Dyschromatopsia
RAPD if asymmetric
Pain with eye movement
Asymmetric or unilateral disease

Children with MOG-associated optic neuritis may have dramatic bilateral disc swelling, so clinical distinction can occasionally be difficult.

Neuroretinitis

Neuroretinitis typically produces:

Optic disc edema
Macular star

with visual loss.

Bartonella is a classic cause.

This differs from papilledema, although severe papilledema can occasionally also produce macular exudates.

Treatment Principles

There is no treatment directed specifically at the swollen optic disc.

Treatment must address:

The underlying cause of raised ICP

while protecting vision.

Hydrocephalus

Treatment may require:

Ventriculoperitoneal shunt
Endoscopic third ventriculostomy in selected cases
Revision of a malfunctioning shunt

Shunt Malfunction

Children with ventricular shunts may develop:

Headache
Vomiting
Lethargy
Diplopia
Visual changes

Papilledema may recur, but:

A normal optic disc does not exclude shunt malfunction, especially in infants or children with prior optic atrophy.

Pediatric IIH – Weight Management

In children with obesity, particularly adolescents:

Gradual weight reduction is disease-modifying therapy.

Management should be developmentally appropriate and often involves:

Pediatrician
Dietitian
Endocrinology or obesity specialist

Aggressive calorie restriction is inappropriate in growing children.

Acetazolamide

Acetazolamide is the principal medication used to lower ICP in pediatric IIH.

It works by decreasing:

CSF production

Dosing is weight-based and individualized.

A commonly used starting range is approximately:

15–25 mg/kg/day divided into several doses

with titration according to:

Response
Tolerance
Severity

Higher doses may be used under specialist supervision.

Acetazolamide Adverse Effects

Potential adverse effects include:

Paresthesias
Fatigue
GI symptoms
Dysgeusia
Metabolic acidosis
Electrolyte abnormalities
Kidney stones

Monitor:

Electrolytes
Renal function

when treatment is prolonged or high-dose.

Topiramate

Topiramate may be useful when:

Headache is prominent
Weight management is relevant
Acetazolamide is poorly tolerated

Potential adverse effects include:

Cognitive slowing
Paresthesias
Appetite suppression
Nephrolithiasis

Rarely it can cause:

Acute bilateral angle closure with myopic shift

Furosemide

Furosemide may be used as:

Adjunctive therapy
Alternative when acetazolamide cannot be used

Evidence is weaker than for acetazolamide.

Corticosteroids

Systemic corticosteroids are not routine treatment for pediatric IIH.

They can cause:

Weight gain
Systemic toxicity
Rebound intracranial hypertension during withdrawal

Steroids are reserved for specific underlying inflammatory or mass-related conditions.

Repeated Lumbar Punctures

Older teaching suggested serial LPs as treatment.

Modern practice:

Repeated lumbar punctures are not routine definitive therapy for IIH and are not reliably curative.

CSF is rapidly regenerated.

LP may occasionally be used as a:

Short-term temporizing measure

while definitive therapy is arranged.

Optic Nerve Sheath Fenestration

ONSF may be considered for:

Progressive visual field loss
Severe papilledema
Failure of medical treatment
Vision-threatening IIH

It is particularly useful when:

Vision is the dominant concern

rather than headache.

CSF Diversion

Options include:

Ventriculoperitoneal shunt
Lumboperitoneal shunt

VP shunting is often preferred in many centers.

Indications include:

Progressive visual loss
Medically refractory ICP elevation
Fulminant disease

Fulminant Pediatric IIH

Rapidly progressive papilledema with visual loss is an emergency.

Urgent treatment may require:

ONSF
CSF diversion

rather than prolonged trials of medication.

Brain Tumor

Management may require:

Neurosurgical resection
Oncology treatment
CSF diversion
Corticosteroids for tumor-associated vasogenic edema when appropriate

Cerebral Venous Sinus Thrombosis

CVST generally requires:

Anticoagulation

under pediatric neurology/hematology supervision, unless there is a specific contraindication.

Medication-Induced Intracranial Hypertension

Potential offending drugs should be discontinued when possible.

Important examples:

Tetracyclines
Isotretinoin/other systemic retinoids
Growth hormone in selected cases

Do not combine tetracycline-class antibiotics with systemic retinoids because both are associated with intracranial hypertension.

Craniosynostosis

Treatment may require:

Craniofacial surgery
Neurosurgical decompression

Ophthalmic follow-up remains important before and after surgery.

Referral

Children with suspected papilledema generally require urgent coordination between:

Pediatric ophthalmology / neuro-ophthalmology
Pediatric neurology
Neurosurgery

Depending on cause:

Neuro-oncology
Hematology
Endocrinology
Craniofacial surgery

may be required.

Follow-Up

Follow-up frequency depends on:

Severity of papilledema
Visual field status
Underlying diagnosis
Rate of progression

Vision-threatening disease may require reassessment within:

Days to weeks

Monitoring

Serial ophthalmic examinations should include:

Visual acuity
Pupils
Color vision
Optic disc examination
Fundus photography
OCT
Visual fields when reliable

Children With Shunts

Periodic ophthalmic surveillance can help detect recurrent elevated ICP.

However:

The eye examination should never be used as the sole test of shunt function.

Papilledema may be absent despite shunt failure.

Resolution of Papilledema

Disc edema may take:

Several weeks

to resolve after ICP has normalized.

Therefore, persistent swelling immediately after successful treatment does not necessarily indicate treatment failure.

Prognosis

When elevated ICP is identified and treated promptly:

Visual prognosis is generally good

Poorer outcomes occur with:

Severe papilledema
Delayed diagnosis
Recurrent raised ICP
Shunt malfunction
Fulminant IIH
Established optic atrophy

Optic Atrophy

Long-standing pressure may cause irreversible:

RNFL loss
Optic pallor
Visual field loss
Central visual loss

Once optic atrophy occurs:

Normalization of ICP cannot restore lost axons.

Patient and Family Education

Families should understand warning symptoms of recurrent raised ICP:

New or worsening headache
Vomiting
Lethargy
New strabismus or diplopia
Transient visual obscurations
New visual loss
Seizure
Behavioral change

Children with shunts require particular vigilance for:

Shunt malfunction

Complications

Potential complications include:

Permanent visual field loss
Optic atrophy
Reduced visual acuity
CN VI palsy
Chronic headache

Underlying disease may also produce:

Neurologic injury
Seizures
Hydrocephalus
Stroke
Death

Treatment complications include:

Medication toxicity
Post-LP headache
Shunt infection
Shunt obstruction
Shunt revision
ONSF-related diplopia or optic nerve injury

Ophthalmology Pearls

Papilledema in children = optic disc swelling from elevated intracranial pressure.
Infants with open sutures or fontanelles may have markedly elevated ICP without papilledema.
The same is true after severe optic atrophy: a damaged optic nerve may be unable to swell.
In young children, raised ICP may present with irritability, lethargy, vomiting, increasing head circumference, or new strabismus rather than a verbalized headache.
Sixth nerve palsy is the classic ocular motor manifestation of raised ICP.
Early papilledema may have normal visual acuity, whereas pediatric optic neuritis usually causes more prominent acuity and color loss.
The most important pseudopapilledema mimic is buried optic disc drusen.
MRI brain plus MRV is preferred when papilledema is suspected and the child is stable enough for MRI.
Pediatric LP opening pressure around ≥28 cm H₂O is generally considered elevated; interpretation depends on obesity, sedation, and technique.
In adolescents with obesity and IIH, weight management plus acetazolamide are standard initial treatments.
Systemic corticosteroids and serial lumbar punctures are not routine long-term therapy for IIH.
Rapidly progressive visual loss from fulminant IIH requires urgent surgical consideration.
Papilledema can take weeks to resolve after ICP normalizes.
In a child with a ventricular shunt, absence of papilledema does not exclude shunt malfunction.

Kembara Xtra

Facts about medicine and its subtopic such as anatomy, physiology, biochemistry, pharmacology, medicine, pediatrics, psychiatry, obstetrics and gynecology and surgery.

Ophthalmology – Phacoanaphylactic Glaucoma

Ophthalmology – Peters Anomaly

Ophthalmology – Persistent Hyperplastic Primary Vitreous / Persistent Fetal Vasculature

Ophthalmology – Persistent Fetal Vasculature (PFV)

Ophthalmology – Peripheral Corneal Ulcers / Peripheral Ulcerative Keratitis

Ophthalmology – Periocular Infantile Hemangioma

Ophthalmology – Pediculosis Ciliaris (Phthiriasis Palpebrarum)

Ophthalmology – Pediatric Optic Nerve Hypoplasia

Ophthalmology – Pattern Dystrophy

Ophthalmology – Papilledema in Children

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