Carpal Tunnel Syndrome Caused by Palmaris Profundus Sharing Common Sheath with Median Nerve

Carpal tunnel syndrome is the most common entrapment neuropathy in adults, usually caused by thickening of the flexor retinaculum. Occasionally, compression of the median nerve at the wrist may be caused by the presence of an intracanalar tumor or anatomic variations. We report in this manuscript, the case of a carpal tunnel syndrome secondary to the presence of a palmaris profundus tendon included in a common sheath with the median nerve.