title: Unusual variant of the extensor carpi radialis brevis muscle: a case report.
abstract: A variation of the extensor carpi radialis brevis muscle (ECRB) origin was discovered during a cadaveric dissection. The identified ECRB originated from the fascia/tendon of the extensor digitorum communis (EDC), without any of its origin at the usual location on the lateral epicondyle. The ECRB tendon inserted onto the third metacarpal base. A branch of the posterior interosseous nerve innervated the ERCB. This is the first report of an ECRB originating from the EDC fascia/tendon. This unique variation of the ECRB origin may be of clinical interest, especially in the treatment of lateral epicondylitis (tennis elbow).
authors.affiliation: Division of Hand Surgery, Department of Orthopaedic Surgery and Rehabilitation, The University of Texas Medical Branch, Galveston, Texas 77555, USA.
authors.forename: Hiromichi
authors.initials: H
authors.lastname: Mitsuyasu
authors.forename: Ryo
authors.initials: R
authors.lastname: Yoshida
authors.forename: Munir
authors.initials: M
authors.lastname: Shah
authors.forename: Rita M
authors.initials: RM
authors.lastname: Patterson
authors.forename: Steven F
authors.initials: SF
authors.lastname: Viegas
mesh_terms: D002102:Cadaver; D004550:Elbow / Q000033:anatomy & histology*; D005260:Female; D005542:Forearm / Q000033:anatomy & histology*; D006801:Humans; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000033:anatomy & histology*; D013716:Tennis Elbow / Q000473:pathology