Fig. 11From: Nerve entrapment syndromes of the upper limb: a pictorial reviewCauses of median nerve entrapment are illustrated. a: 56-year-old male with supracondylar spur seen on lateral elbow X-ray (white arrow). This is a known risk factor for median nerve impingement at the ligament of Struthers. b: Axial PD of 50-year-old female with carpal tunnel syndrome proven on electrophysiology. There is a congenital variant of bifid median nerve (white arrows) with persistent median artery (blue arrow) which can predispose to carpal tunnel syndrome. c: 30-year-old female with carpal tunnel syndrome. This patient has a ganglion (blue arrow) that is encroaching on the carpal tunnel. There is indentation of the median nerve with a width/height ratio of more than 3 (white arrow)Back to article page