Anomalous Flexor Digitorum Superficialis Muscle Belly Associated with Carpal Tunnel Syndrome

Alexander J Hallwachs; Christopher Geiger; Peter Young; Kevin Malone

doi:10.1016/j.jhsg.2023.04.007

Anomalous Flexor Digitorum Superficialis Muscle Belly Associated with Carpal Tunnel Syndrome

J Hand Surg Glob Online. 2023 May 8;5(4):471-473. doi: 10.1016/j.jhsg.2023.04.007. eCollection 2023 Jul.

Authors

Alexander J Hallwachs¹, Christopher Geiger², Peter Young³, Kevin Malone¹

Affiliations

¹ Department of Orthopaedic Surgery, Case Western Reserve University/University Hospitals, Cleveland, OH.
² Department of Neurology, Case Western Reserve University/University Hospitals, Cleveland, OH.
³ Department of Radiology, Case Western Reserve University/University Hospitals, Cleveland, OH.

Abstract

Anomalous muscle bellies in the forearm generally are asymptomatic and appreciated in an academic sense during cadaveric dissections. Few prior anatomic variations in muscle bellies have been described with symptoms, and are associated even more rarely with carpal tunnel syndrome (CTS). We discuss the evaluation and management of a case of CTS associated with a muscle belly of the flexor digitorum superficialis to the index within the carpal tunnel.

Keywords: Carpal tunnel syndrome; Flexor digitorum superficialis; Neuromuscular ultrasound; Open carpal tunnel release.

Publication types

Case Reports