Rayan G M, Mustafa E
Orthopaedic Surgery Department, University of Oklahoma Health Sciences Center, Oklahoma City.
J Hand Surg Am. 1989 May;14(3):550-2. doi: 10.1016/s0363-5023(89)80023-1.
Abnormal insertion of an abductor pollicis longus slip into an anomalous thenar muscle was observed during reconstruction of the carpometacarpal joint of the thumb in two patients. The anomalous thenar muscle most probably represents duplication of the abductor pollicis brevis.