Musculoskeletal · Hand and Wrist Disorders
The facts most likely to be tested
De Quervain tenosynovitis involves stenosing tenosynovitis of the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) tendons.
The condition is caused by repetitive thumb abduction and wrist extension, often seen in new mothers or individuals performing repetitive manual tasks.
The Finkelstein test is the pathognomonic physical exam maneuver, performed by having the patient make a fist with the thumb inside and performing ulnar deviation to elicit pain.
Patients classically present with radial-sided wrist pain that radiates to the forearm and is exacerbated by thumb movement.
First-line management consists of thumb spica splinting, activity modification, and nonsteroidal anti-inflammatory drugs (NSAIDs).
Corticosteroid injections into the first dorsal compartment are the most effective treatment for patients who fail conservative management.
Surgical decompression of the first dorsal compartment is reserved for refractory cases that do not respond to conservative therapy or injections.
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A 32-year-old female presents to the clinic complaining of persistent radial-sided wrist pain that has worsened over the past three weeks. She recently gave birth and reports that the pain is exacerbated when she lifts her infant. On physical examination, there is tenderness over the radial styloid. When the patient makes a fist with her thumb tucked inside and the physician performs ulnar deviation, she experiences sharp, reproducible pain.
What is the most likely diagnosis?
De Quervain tenosynovitis
The patient's presentation of radial-sided wrist pain exacerbated by thumb movement and a positive Finkelstein test is classic for De Quervain tenosynovitis, which involves the APL and EPB tendons.
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Etiology / Epidemiology
Common in repetitive thumb use and postpartum women due to tendon sheath inflammation.
Clinical Manifestations
Radial-sided wrist pain with Finkelstein test positive; pain exacerbated by thumb movement.
Diagnosis
Clinical diagnosis confirmed by Finkelstein test; imaging rarely required.
Treatment
Thumb spica splint and NSAIDs are first-line; corticosteroid injection for refractory cases.
Prognosis
Most resolve with conservative care; surgical release of the first dorsal compartment is curative.
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Epidemiology & Etiology
Prevalent in patients performing repetitive thumb abduction/extension, such as golfers, racquet sports players, or new mothers lifting infants. It is most common in women aged 30–50 years. Chronic overuse leads to stenosing tenosynovitis of the first dorsal compartment.
Pertinent Anatomy
The first dorsal compartment contains the abductor pollicis longus (APL) and extensor pollicis brevis (EPB) tendons. These tendons pass through a fibro-osseous tunnel over the radial styloid process.
Pathophysiology
Repetitive friction causes thickening of the extensor retinaculum and synovial sheath inflammation. This narrowing restricts tendon gliding, leading to pain and potential crepitus. Chronic inflammation results in fibrosis of the sheath.
Clinical Manifestations
Patients present with radial-sided wrist pain radiating to the forearm. The Finkelstein test is the pathognomonic maneuver: the patient makes a fist with the thumb inside and ulnarly deviates the wrist, eliciting sharp pain. Red flags include fever or erythema, which suggest septic tenosynovitis.
Diagnosis
Diagnosis is primarily clinical. The Finkelstein test is the gold standard physical exam maneuver. Radiographs are typically normal but may be ordered to rule out scaphoid fracture or osteoarthritis of the first carpometacarpal joint.
Treatment
Initial management includes thumb spica splinting and NSAIDs for 3–6 weeks. If symptoms persist, corticosteroid injection into the sheath is highly effective. Avoid injection into the tendon to prevent rupture. Surgical decompression of the first dorsal compartment is reserved for refractory cases.
Prognosis
Conservative management is successful in 80% of cases. Complications are rare but include tendon rupture or persistent pain if the sub-compartment is missed during surgery.
Differential Diagnosis
Scaphoid fracture: snuffbox tenderness
Intersection syndrome: pain proximal to the radial styloid
First CMC arthritis: positive grind test
Wartenberg syndrome: superficial radial nerve sensory deficit
Radial styloid fracture: history of trauma