ULNAR NERVE COMPRESSION AT THE ELBOW CAUSED BY A PROMINENT MEDIAL HEAD OF THE TRICEPS AND AN ANCONEUS EPITROCHLEARIS MUSCLE

A number of musculo-tendinous variations around the medial epicondyle have been alleged to cause ulnar nerve compression, Subluxation of the ulnar nerve, a ''snapping'' separate medial head of triceps, a promin ent medial head of triceps covering the ulnar nerve, anconeus epitroch learis, Osborne's band, and the ligament of Struthers have been implic ated, We present a case of clearcut compression of the ulnar nerve at two levels just at and posterior to the epicondyle by a tightly applie d prominent head of the triceps, and at a more distal level beneath an anconeus epitrochlearis muscle.