Carpal tunnel syndrome secondary to a rare anatomical variation of the median nerve

Abstract

Carpal tunnel syndrome is one of the the most common reasons for consultation in hand surgery with an annual incidence of 300 per 100 000 inhabitants and, in France, of 80 000 surgical interventions. In most cases, carpal tunnel syndrome is idiopathic occurring without a recognizable cause. However, beyond these forms, the merging of several mechanisms can explain the cause-and-effect relationship of this pathology. This study aimed to highlight an exceptional association of a carpal tunnel syndrome secondary to a rare anatomical variety of the median nerve.