Orthopaedic Surgery - Sever Disease

Basics

Sever disease, also called:

Calcaneal apophysitis

is a common cause of:

Posterior heel pain in growing children.

The pain arises from repetitive stress across the:

Calcaneal apophysis or growth plate.

Nature of the Condition

Sever disease is considered a form of:

Traction apophysitis

or historically an:

Osteochondrosis

in which the developing cartilage and bone of the calcaneal apophysis become painful under repetitive mechanical loading.

Natural History

The condition is:

Self-limited.

Symptoms resolve as the:

Calcaneal growth plate matures and eventually closes.

It does not cause permanent structural damage.

Laterality

Sever disease may be:

Unilateral

or

Bilateral.

Bilateral involvement is relatively common.

Epidemiology

Sever disease occurs most often in:

Preadolescent children

during periods of rapid growth.

Historical estimates suggest that it affects approximately:

5–10% of preadolescents.

Sex

Boys have historically been reported to be affected more often than:

Girls

although the condition occurs in both sexes.

Typical Age

The classic patient is an active child approximately:

9–12 years old

although the precise age varies with:

Skeletal maturity

and timing of the growth spurt.

Risk Factors

Important risk factors include:

Running sports

Jumping activities

Rapid growth

High training volume

and repetitive loading of the:

Heel.

Genetics

There is no recognized:

Genetic predisposition

to Sever disease.

Etiology

The:

Achilles tendon

inserts near the calcaneal apophysis.

During periods of rapid growth, the apophysis may be relatively vulnerable to:

Repetitive traction forces.

Achilles Tendon Traction

Tension generated by the:

Gastrocnemius–soleus complex

and Achilles tendon repeatedly loads the developing:

Calcaneal apophysis.

This is particularly important during:

Running

Jumping

and

Sports involving repeated acceleration.

Impact Loading

Heel impact during athletic activity produces additional stress across the:

Calcaneus

and

Apophysis.

The combination of:

Achilles traction

and

Repetitive impact

contributes to symptoms.

Growth Spurt

During a rapid growth phase, the bones may lengthen faster than the:

Muscle-tendon units

adapt.

This can increase tension in the:

Achilles tendon

and further stress the calcaneal apophysis.

Diagnosis

Sever disease is primarily a:

Clinical diagnosis.

The diagnosis is based on:

Age

Activity pattern

Location of pain

and

Characteristic examination findings.

Signs and Symptoms

Pain usually begins:

Gradually

without a specific traumatic event.

Pain Location

The pain is located at the:

Posterior aspect of the heel

over the calcaneal apophysis.

It is typically:

Below the Achilles tendon insertion

rather than on the:

Plantar surface of the foot.

Activity Relationship

Pain is usually worsened by:

Running

Jumping

and other impact activities.

Symptoms may be particularly noticeable:

After activity.

Rest

Pain improves with:

Prolonged rest

or temporary reduction in:

Sports participation.

Duration

Symptoms may recur for:

Several months

during the growth period.

The intensity often fluctuates according to:

Activity level.

Bilateral Symptoms

Either one or both heels may be involved.

Children with bilateral symptoms frequently report alternating severity between:

Right and left sides.

Physical Examination

The child often points directly to or grasps the:

Posterior heel

when describing the painful area.

Calcaneal Squeeze Test

Pain can usually be reproduced by:

Medial and lateral compression of the calcaneus

near the apophysis.

This is often referred to as the:

Calcaneal squeeze test.

Tenderness

Tenderness is generally localized to the:

Posterior calcaneal apophysis.

The pain is usually uncomfortable but not:

Exquisitely severe.

Marked or disproportionate tenderness should raise concern for another diagnosis.

Dorsiflexion

Passive ankle dorsiflexion may cause a:

Mild increase in symptoms

because it tensions the:

Achilles tendon.

Swelling

Visible swelling is usually:

Absent.

This differs from conditions such as:

Osgood–Schlatter disease

where a prominent apophyseal swelling may develop.

Gait

Children with more severe symptoms may develop:

Antalgic gait

or avoid placing the heel fully on the ground.

Some may preferentially:

Toe walk

to reduce heel impact.

Laboratory Tests

Routine laboratory testing is:

Not required.

Electrolytes and Vitamin D

Sever disease is not typically associated with abnormalities in:

Electrolytes

or

Vitamin D.

Laboratory evaluation should be reserved for patients in whom another metabolic or inflammatory disorder is suspected.

Imaging

Plain Radiographs

Radiographs are usually:

Not necessary

when the history and examination are classic.

There is no specific radiographic finding that confirms:

Sever disease.

Normal Calcaneal Apophysis

The normal developing calcaneal apophysis may appear:

Sclerotic

Irregular

and

Multipartite.

These findings are normal developmental appearances and should not be mistaken for:

Diagnostic evidence of disease.

Role of Radiographs

Radiographs may be obtained when symptoms are:

Atypical

Unilateral and severe

Persistent

or associated with concern for:

Fracture

Bone lesion

or

Infection.

MRI

MRI is rarely required.

In prolonged symptomatic cases, MRI may demonstrate:

Bone marrow edema

within or around the:

Calcaneal apophysis.

Pathological Findings

There is no characteristic pathological specimen because:

Biopsy and surgery are not indicated.

The condition reflects a temporary mechanical stress response of the:

Developing apophysis.

Differential Diagnosis

Important alternative diagnoses include:

Retrocalcaneal bursitis

Achilles tendinopathy

Plantar fasciitis

Calcaneal stress fracture

Calcaneal osteomyelitis

Unicameral bone cyst

Inflammatory enthesitis

Retrocalcaneal Bursitis

Retrocalcaneal bursitis produces more localized tenderness near the:

Anterior aspect of the Achilles insertion.

It is seen more frequently in:

Older adolescents

and

Adults.

Achilles Tendinopathy

Achilles tendinopathy causes pain primarily within the:

Tendon itself.

Associated findings may include:

Tendon thickening

Swelling

and occasionally:

Crepitus with ankle movement.

Plantar Fasciitis

Plantar fasciitis causes pain on the:

Plantar-medial heel

rather than the posterior calcaneus.

It is much more common in:

Adults.

Calcaneal Stress Fracture

A calcaneal stress fracture may also produce:

Heel pain

and a positive squeeze test.

Concern should increase when pain is:

Progressive

Present at rest

or associated with substantially reduced ability to:

Bear weight.

Calcaneal Osteomyelitis

Calcaneal osteomyelitis is uncommon but important.

Features suggesting infection include:

Fever

Marked tenderness

Systemic illness

Night pain

or elevated:

Inflammatory markers.

Unicameral Bone Cyst

A unicameral bone cyst of the calcaneus may be detected incidentally or after:

Persistent pain

or

Pathological fracture.

Radiographs help identify this condition.

Inflammatory Enthesitis

Inflammatory disorders such as:

Spondyloarthritis

can produce heel pain at tendon or fascia attachment sites.

These diagnoses should be considered when heel pain is associated with:

Morning stiffness

Other joint symptoms

Back pain

or systemic inflammatory features.

Treatment

The mainstay of treatment is:

Conservative management.

Activity Modification

Temporary reduction of painful:

Running

Jumping

and

High-impact sports

is often sufficient.

Complete restriction from all physical activity is usually unnecessary.

Rest

Relative rest should be guided by:

Symptoms.

The child may continue activities that do not produce substantial pain or:

Limping.

Stretching

Stretching of the:

Gastrocnemius

Soleus

and

Achilles tendon

is often helpful.

Stretching may be performed:

Before and after activity.

Ice

Ice may provide symptomatic relief after:

Sports

or during periods of:

Increased pain.

Footwear

Supportive shoes with good:

Heel cushioning

can reduce repetitive impact.

Heel Cups

Useful inserts include:

Heel cups

Gel heel pads

or other cushioned:

Heel lifts.

These reduce pressure and traction across the:

Calcaneal apophysis.

Immobilization

For severe or persistent symptoms that do not improve with simpler measures, short-term immobilization in a:

Walking boot

or occasionally a:

Cast

may be considered.

Time and Maturity

The most important elements in recovery are:

Time

and

Skeletal maturation.

Symptoms eventually resolve as the:

Calcaneal apophysis closes.

Physical Therapy

Physical therapy may be useful when the child needs additional assistance with:

Calf stretching

Achilles flexibility

Strengthening

or correction of activity-related movement patterns.

Medication

Symptomatic medication may include:

NSAIDs

or

Acetaminophen

when appropriate.

These medications provide:

Pain relief

but do not alter the natural history of the condition.

Surgery

Surgery is:

Never indicated

for uncomplicated Sever disease.

There is no role for:

Apophyseal excision

Fixation

or other operative treatment.

Follow-Up

Follow-up may be arranged:

As needed

for persistent symptoms, education, or diagnostic uncertainty.

Patient Education

Families should understand that the condition is:

Benign

Self-limited

and related to:

Growth and repetitive mechanical loading.

This helps reduce unnecessary anxiety and allows the child to participate in:

Self-management.

Return to Sports

Return to sport can occur gradually when the child can:

Walk without pain

Run without limping

Jump comfortably

and tolerate activity without significant:

Post-exercise heel pain.

Prognosis

The prognosis is:

Excellent.

Sever disease resolves with:

Skeletal maturity.

Long-Term Outcome

Unlike some traction apophysitis disorders, Sever disease does not usually leave:

Persistent deformity

or

Long-term functional impairment.

Recurrence

Symptoms may recur repeatedly during:

Childhood or early adolescence

especially during periods of:

Rapid growth

or increased:

Sports participation.

Complications

There are essentially no permanent complications.

The main difficulty is:

Recurrent activity-related pain

during the period before the growth plate closes.

Key Principle

Sever disease is calcaneal apophysitis causing posterior heel pain in active, growing children, typically during the preadolescent growth spurt.

The diagnosis is primarily:

Clinical, with posterior calcaneal tenderness and pain on heel squeeze.

Radiographs are usually unnecessary because the normal calcaneal apophysis can appear:

Sclerotic, irregular, and fragmented.

Treatment consists of:

Activity modification, Achilles and calf stretching, ice, supportive cushioned footwear, heel cups, and occasional short-term immobilization, while:

Surgery has no role.

The condition ultimately:

Resolves completely with skeletal maturity.