title: Supernumerary extensor pollicis longus tendon: a case report.
abstract: We report a rare case in which the extensor pollicis longus (EPL) tendon was separated into 2 slips at the site of origin, ran an abnormal course across the wrist, and combined in the vicinity of the metacarpophalangeal (MCP) joint; the tendon on the radial side passed through another tendon sheath between the first and second compartments and the tendon on the ulnar side passed over the extensor retinaculum.
authors.affiliation: Department of Orthopaedic Surgery, Nippon Medical School, Tokyo, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Sawaizumi
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Nanno
authors.forename: Hiromoto
authors.initials: H
authors.lastname: Ito
mesh_terms: D000328:Adult; D005385:Fingers / Q000002:abnormalities*; D006801:Humans; D008297:Male; D013710:Tendons / Q000002:abnormalities*; D013717:Tenosynovitis / Q000209:etiology* / Q000601:surgery