Extensor triggering in de Quervain's stenosing tenosynovitis

Triggering of the abductor pollicis longus in association with deQuervain's tenosynovitis

“…However, locking occurred in extension rather than flexion. Triggering of the thumb in extension has been reported to have a rare prevalence less than 1.3% 15. Among the few reported cases that exist, approximately half report the presence of a nodule in at least one of the first dorsal compartment tendons and only two cases trace symptoms directly to the APL in isolation 15–18.…”

Dynamic ultrasound assessment of extensor compartment 1 of the wrist‐snapping thumb

“…Triggering or locking is not a common symptom in de Quervain disease; however, dynamic imaging is a quick and important part of sonographic assessment particularly if the patient reports snapping‐type symptoms. A retrospective review of 827 cases of de Quervain disease reported 1.3% prevalence of extensor triggering . The patients with triggering that went on to have surgical release were all noted to have synovitis, separate compartments for EPB and APL, and no tendon nodules.…”

“…There are a number of causes of radial-sided wrist pain including de Quervain's synovitis, osteoarthritis, and proximal and distal intersection syndrome, and (with a history of trauma) scapholunate injury and scaphoid avascular necrosis should be considered. 8,9 De Quervain disease is stenosing tenosynovitis of the APL and EPB tendons in the E1 compartment. Characteristic sonographic findings of de Quervain disease are thickening of the tendon sheath, tendon sheath effusion, and thickening of the tendons with increased vascularity on Doppler imaging.…”

Sonography in wrist tendon pathology

“…7 Triggering implies a more recalcitrant disease course, not responding to conservative treatment, and may be overlooked if not specifically tested. Triggering is uncommon, occurring in only 1.3% of cases.…”