Auxiliary Head of Origin of Flexor Pollicis Longus – A Case Report

Abstract

Incidence of auxiliary head of the flexor pollicis longus muscle has been described repeatedly. Accessory head has been noted arising from the lateral or more rarely from the medial border of the coronoid process of the ulna. During routine dissection, we found a rare case of an additional slip of tendinous origin of flexor pollicis longus muscle from the medial epicondyle of the humerus. However, such anomaly was not found on the left side. The embryological source and clinical impact of the current incident are discussed.