Compression of the Deep Palmar Branch of the Ulnar Nerve by a Ganglion

摘要

A ganglion originating from the pisotriquetral joint is the most common cause of distal ulnar nerve compression. Midpalmar ganglions causing ulnar nerve compression are rare. This case describes a ganglion arising from the third carpometacarpal joint causing compression of the deep motor branch of the ulnar nerve.