Snapping of the Thumb Caused by Supernumerary Extensor Pollicis Longus Tendon.

ABSTRACT: Supernumerary extensor tendons of the hand are relatively common, whereas supernumerary extensor pollicis longus (EPL) tendons are rarely reported. Herein, we present the case of a 17-year-old boy with painful snapping at the anatomical snuffbox after repetitive pushups. Preoperative dynamic ultrasonography and magnetic resonance imaging revealed the bifurcation of EPL tendons. Through explorative surgery under wide-awake anesthesia, we found 2 EPL tendons with a single EPL muscle, which pass through the single extensor compartment and EPL canal distally. Intraoperatively, after releasing the extensor compartment and EPL canal, each EPL tendon was rerouted to a separate gliding plane to resolve the snapping symptom and recurrence. Six months postoperatively, the snapping symptom was resolv

SUBMITTER: Oh S 

PROVIDER: S-EPMC11557055 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature