Stenosing tenosynovitis of the first dorsal extensor compartment (APL and EPB) causing radial wrist pain with thumb use.
Also known as: De Quervain, de Quervain tenosynovitis, first dorsal compartment tenosynovitis, mother's wrist, baby wrist
Overview
Stenosing tenosynovitis of the first dorsal extensor compartment of the wrist, which contains the abductor pollicis longus (APL) and extensor pollicis brevis (EPB). Repetitive thumb and wrist movements produce thickening of the tendon sheath and pain at the radial styloid.
Epidemiology
More common in women, particularly 30-50 years and especially postpartum (caring for infants — 'mother's wrist'). Bilateral in many patients.
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Repetitive forceful gripping with ulnar deviation — texting, video gaming, racquet sports, golf, knitting
Inflammatory arthritis (RA, psoriatic)
Anatomic variants — septated compartment with EPB in separate subcompartment
Diabetes mellitus
Pathophysiology
Repetitive gliding of APL and EPB through a narrow fibro-osseous tunnel produces myxoid degeneration and thickening of the tendon sheath. The condition is more accurately a tendinopathy with fibrocartilaginous metaplasia than a true inflammatory tenosynovitis.
Clinical presentation
Symptoms
Insidious or post-activity onset of pain along the radial side of the wrist
Pain with thumb movement, lifting an infant, grasping, twisting jars, wringing cloths
Pain may radiate proximally up the forearm or distally into the thumb
Swelling and a palpable thickening over the radial styloid
Signs / physical exam
Tenderness and often visible swelling over the first dorsal compartment at the radial styloid
Positive Finkelstein test — pain reproduced when the patient grasps the thumb in the fist and the examiner deviates the wrist ulnarly
Positive Eichhoff test (modified Finkelstein — patient makes a fist over flexed thumb, then ulnar deviation)
Pain with resisted thumb abduction or extension
Crepitus rarely palpable
Differential diagnosis
Thumb basal joint (CMC) osteoarthritis — Pain at the base of the thumb (carpometacarpal joint), positive grind test, X-ray with joint space narrowing; common in postmenopausal women
Intersection syndrome — Pain more proximal (~4-8 cm proximal to radial styloid) at crossing of first and second dorsal compartments
Wartenberg syndrome (superficial radial nerve) — Sensory symptoms over dorsum of thumb; negative Finkelstein
Scaphoid fracture — Snuffbox tenderness after fall on outstretched hand
Carpal tunnel syndrome — Volar nocturnal paresthesias, median nerve distribution
Trigger thumb (flexor pollicis longus stenosing tenosynovitis) — Volar thumb pain with locking/catching
Diagnostic workup
Labs
Not indicated unless inflammatory arthritis suspected
Imaging
Generally NOT needed — clinical diagnosis
Ultrasound — sheath thickening, fluid, possible septation; useful for guided injection
Plain radiographs only to exclude alternative diagnoses (CMC OA, scaphoid fracture)
Diagnostic algorithm
Feature
De Quervain Tenosynovitis
Thumb CMC OA
Location of tenderness
Radial styloid (dorsal)
Base of thumb / CMC joint
Provocative test
Finkelstein / Eichhoff
Grind test (axial + rotation)
X-ray findings
Often normal
Joint space narrowing, osteophytes
Typical demographic
Postpartum women, repetitive thumb use
Postmenopausal women
First-line treatment
Splint, NSAIDs, steroid injection
NSAIDs, splint, CMC injection
Definitive treatment
First dorsal compartment release
CMC arthroplasty / suspensionplasty
De Quervain vs CMC OA — overlapping demographics, very different anatomy and treatment.
Thumb spica splint (forearm-based, leaving IP joint free) for 4-6 weeks
Ice after provocative activity
NSAIDs — ibuprofen, naproxen, meloxicam — short course
Topical NSAIDs (diclofenac gel) — particularly useful in pregnancy/postpartum
Second-line / adjunct
Corticosteroid injection into the first dorsal compartment — high success rate (≥80%) for symptom resolution; ultrasound guidance improves accuracy especially with septation; ensure injection enters the EPB subcompartment if present
Surgical release of the first dorsal compartment — reserved for failure of conservative care after 6-12 weeks; identify and release any EPB subcompartment to avoid persistent symptoms
Hand therapy
Complications
Persistent or recurrent symptoms — frequently due to missed EPB subcompartment at the time of injection or surgery
Cutaneous atrophy or depigmentation from steroid injection (warn patients, especially darker-skinned)
Postoperative superficial radial nerve injury
Volar subluxation of tendons after over-aggressive surgical release
Recurrence with resumption of provoking activities
PANCE pearls
Postpartum women lifting infants are a classic patient — counsel on lifting technique with palm under the infant rather than thumb-out gripping.
Differentiate from thumb CMC OA: De Quervain tender at the radial styloid, CMC OA tender at the base of the thumb and positive grind test.
Up to one-third of patients have a septated first dorsal compartment — failure of injection often reflects EPB not being reached.
Steroid injections are highly effective; surgery is reserved for refractory cases.
In pregnancy, topical NSAIDs and splinting are preferred over oral systemic therapy.
References
ASSH 2020 — American Society for Surgery of the Hand — Clinical Practice Statement: De Quervain Tenosynovitis (2020)
AAFP 2015 — Hand and Wrist Injuries: Common Problems and Solutions (Wolfe et al., Am Fam Physician 2015)
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