Orthopaedic Surgery - De Quervain (Radial Styloid) Tenosynovitis

Basics

De Quervain tenosynovitis, also called radial styloid tenosynovitis, is a stenosing disorder involving the first dorsal extensor compartment of the wrist.

This compartment contains the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) tendons.

Patients typically complain of pain and tenderness over the radial side of the wrist, particularly near the radial styloid.

Epidemiology

De Quervain tenosynovitis can occur in either sex and at almost any age, but it is especially common in middle-aged women.

Among working-age adults, the reported incidence is approximately 1.3% in women and 0.5% in men.

Risk Factors

Important risk factors include female sex, middle age, repetitive wrist use, and repetitive thumb motion.

The condition is also frequently seen in new mothers, often because of the repetitive wrist and thumb positions used while lifting and caring for an infant.

Etiology

The disorder is generally considered more of a tendinopathy and stenosing tenosynovial condition than a classic inflammatory tendinitis.

Repeated mechanical stress causes thickening and irritation of the tendon sheath and narrowing of the fibro-osseous tunnel through which the APL and EPB tendons pass.

Repetitive Activities

Activities involving repeated thumb abduction, thumb extension, or wrist deviation may provoke symptoms.

Commonly associated activities include racquet sports, fly fishing, golf, and repetitive infant care.

In golfers, the nondominant wrist may be affected because of the mechanical stresses generated during the swing.

Associated Conditions

De Quervain tenosynovitis may occur in association with rheumatoid arthritis and other inflammatory disorders involving the tendon sheaths.

Diagnosis

Signs and Symptoms

The typical presentation is pain and tenderness along the radial aspect of the wrist, usually directly over the first dorsal compartment near the radial styloid.

The discomfort may radiate proximally into the forearm or distally toward the thumb.

Aggravating Movements

Symptoms are commonly worsened by thumb extension or abduction combined with ulnar deviation of the wrist.

Repetitive gripping, lifting, twisting, and thumb use may be particularly painful.

Physical Examination

Examination may demonstrate localized tenderness, swelling, bogginess, or crepitus over the first dorsal compartment.

The most characteristic area of tenderness lies over the radial side of the radial styloid.

Eichhoff Test

The Eichhoff test, which is frequently mislabeled as the Finkelstein test, is performed by having the patient place the thumb within the palm and close the fingers around it.

The wrist is then deviated toward the ulna.

Reproduction of sharp pain over the first dorsal compartment constitutes a positive test.

Finkelstein Maneuver

The true Finkelstein maneuver involves the examiner gently pulling the patient’s thumb distally and directing the wrist into ulnar deviation.

Pain localized over the first dorsal compartment supports the diagnosis.

WHAT Test

The wrist hyperflexion and abduction of the thumb (WHAT) test is another provocative maneuver.

The patient hyperflexes the wrist and actively abducts the thumb against the examiner’s resistance.

Reproduction of the characteristic radial wrist pain indicates a positive test.

Thumb CMC Examination

The first carpometacarpal joint should also be examined because thumb CMC osteoarthritis may coexist with or mimic de Quervain tenosynovitis.

Range of motion and a CMC grind test should be assessed.

Intersection Syndrome

Intersection syndrome is an important alternative diagnosis.

It is less common than de Quervain tenosynovitis and often produces pain and crepitus approximately 4 cm proximal to the wrist, rather than directly over the radial styloid.

Laboratory Tests

Routine laboratory testing is not required for uncomplicated de Quervain tenosynovitis.

Laboratory studies may be considered only when a systemic inflammatory or rheumatologic disorder is suspected.

Imaging

Plain Radiographs

AP and lateral wrist radiographs may be obtained when there is concern for associated osseous pathology.

Dedicated views of the first carpometacarpal joint may help identify degenerative arthritis that could account for similar symptoms.

Role of Imaging

Imaging is not usually required to establish the diagnosis when the history and examination are classic.

Its primary role is to exclude alternative or concomitant pathology.

Pathophysiology

The APL and EPB tendons pass through a relatively rigid fibro-osseous tunnel within the first dorsal compartment.

Thickening of the tendon sheath and narrowing of the tunnel impair normal tendon gliding.

This produces friction, pain, and progressive irritation with repetitive thumb or wrist movement.

Anatomic Variations

Considerable anatomic variation exists within the first dorsal compartment.

The APL may consist of multiple tendon slips, while the EPB may travel within a separate subsheath.

These variations are important because an unrecognized separate compartment can cause failure of injection or incomplete surgical release.

Differential Diagnosis

Thumb CMC Osteoarthritis

Degenerative disease of the first carpometacarpal joint can produce pain near the base of the thumb.

Pain with the CMC grind test and radiographic degenerative changes favor arthritis.

Intersection Syndrome

Intersection syndrome causes pain where the first dorsal compartment tendons cross the second dorsal compartment tendons.

The tenderness is usually several centimeters proximal to the radial styloid.

Radiocarpal Arthritis

Degenerative disease of the radiocarpal joint can cause radial-sided wrist pain and stiffness.

Radiographs and joint-specific examination help distinguish it from de Quervain disease.

Wartenberg Syndrome

Wartenberg syndrome results from entrapment or irritation of the superficial branch of the radial nerve.

It typically causes burning pain or sensory disturbance over the dorsoradial hand rather than isolated tendon pain.

Treatment

General Principles

Initial management is nonoperative.

A trial of conservative treatment for approximately 3–6 months is appropriate in most patients unless symptoms are unusually severe or persistent.

Activity Modification

Patients should avoid or reduce repetitive movements that aggravate symptoms, particularly repeated thumb abduction, extension, forceful gripping, and sustained wrist deviation.

Thumb Spica Splint

Immobilization of the wrist and thumb in a thumb spica splint may reduce tendon motion and allow symptoms to settle.

Splinting is particularly useful during activities that provoke pain.

NSAIDs

Nonsteroidal anti-inflammatory drugs may be used for symptomatic relief when medically appropriate.

They may decrease pain but do not directly correct the mechanical stenosis.

Corticosteroid Injection

Corticosteroid injection into the first dorsal compartment is highly effective in many patients.

Reported success rates may be as high as approximately 91%.

Injection Technique

Accurate placement within the tendon sheath is important.

Injection failure may occur if an unrecognized EPB subsheath or another septum prevents medication from reaching all involved tendons.

Ultrasound-Guided Injection

Ultrasound guidance can improve visualization of the tendon sheath and anatomic septations.

This may improve injection accuracy, particularly when variant anatomy is present.

Injection Complications

Potential complications include skin depigmentation and subcutaneous fat atrophy at the injection site.

Patients should be counseled about these cosmetic risks.

Physical Therapy

Splinting and activity modification are often the most useful rehabilitation measures.

Therapy may also include gentle stretching, ergonomic modification, and education regarding movements that increase friction within the first dorsal compartment.

Medication

Medical treatment primarily consists of NSAIDs and corticosteroid injection.

Repeated injections should be considered cautiously because of local tissue risks.

Surgery

Indications

Surgery is considered when significant symptoms persist or recur despite appropriate nonoperative treatment.

A previous temporary improvement after corticosteroid injection supports the first dorsal compartment as the source of pain before proceeding with surgery.

Surgical Release

The operation consists of release of the first dorsal extensor compartment.

A radial-sided incision is made over the compartment while carefully protecting the superficial radial sensory nerve branches.

Superficial Radial Nerve Protection

The dorsal sensory branches of the radial nerve frequently cross the surgical field.

They must be identified and protected because direct injury can cause persistent numbness or a painful neuroma.

Release of the Fibro-Osseous Tunnel

The constricting fibro-osseous sheath is opened to allow unrestricted gliding of the APL and EPB tendons.

All internal septa and separate tendon subsheaths must be identified and released.

Dorsal-Sided Release

The sheath is commonly opened along its dorsal margin.

This leaves a volar portion of the retinaculum intact and may help prevent postoperative volar subluxation of the tendons.

Anatomic Variations During Surgery

The surgeon should specifically search for multiple APL slips and a separate EPB compartment.

Failure to recognize these variants is one of the most common reasons for persistent symptoms after surgery.

Postoperative Immobilization

Patients are commonly placed in a thumb spica splint for a short period after surgery.

Motion is then gradually resumed according to wound healing and symptoms.

Follow-Up

Prognosis

The prognosis is generally excellent.

Most patients improve with splinting, corticosteroid injection, or surgical decompression when required.

Follow-Up Schedule

Patients may be reviewed at approximately 3-month intervals until symptoms resolve or a decision regarding operative treatment is made.

Complications

Superficial Radial Nerve Injury

The most serious operative complication is injury to the superficial radial sensory nerve.

Because the nerve lies close to the first dorsal compartment, careful surgical dissection is essential.

Sensory Loss

Nerve injury may result in a localized area of numbness or diminished sensation over the dorsoradial wrist and hand.

Painful Neuroma

More severe nerve injury may lead to formation of a painful neuroma.

This can produce significant chronic pain and may require additional surgery.

Persistent Symptoms

Persistent symptoms after surgical release are most commonly caused by an unreleased septum or an unrecognized separate EPB subsheath.

Revision decompression may be required.

Tendon Subluxation

If the compartment is released improperly, the APL and EPB tendons may subluxate volarly during wrist movement.

A dorsal-sided release technique helps reduce this risk.

Patient Monitoring

Follow-up should assess radial wrist pain, tenderness, thumb and wrist motion, response to splinting or injection, and any sensory changes in the superficial radial nerve distribution.

After surgery, monitoring should also include wound healing, tendon stability, recurrence of symptoms, and evidence of nerve irritation.