Anconeus epitrochlearis muscle causing cubital tunnel syndrome

ultrasonographic diagnosis

Abstract

Cubital tunnel syndrome is the second most prevalent neuropathy in the upper extremity, after carpal tunnel syndrome. Diagnosis should be made on the basis of history, physical examination, and diagnostic imaging studies. In ulnar neuropathy we generally see nocturnal paresthesias in digit IV and V and pain at the elbow, irradiating in the underarm, usually accompanied by weakness of grip. In most cases Tinel’s sign is present across the medial epicondyle. The anconeus epitrochlearis muscle is a rare cause, but treatable of ulnar nerve entraptment. It is probable that the syndrome is more common than it is thought to be.