Carpal tunnel syndrome can be secondary in some patients, vascular anomalies (usually a persistent median artery), median nerve variations, or both are among the etiologic factors. High division of the median nerve proximal to the carpal tunnel (known as a bifid median nerve) is a median nerve anomaly that has an incidence rate of 2.8%. This rare entity is often associated with various abnormalities that are clinically relevant, such as vascular malformations (persistent median artery), aberrant muscles, and carpal tunnel syndrome. Bifid median nerve and median artery association can be seen in %2.8 of population. This anomaly has asymptomatic findings, but in some cases acute and chronic findings can be seen as well. In this article, we present intraoperatively diagnosed median nerve and median artery assosicated carpal tunel sydrome.
Key words: Bifid median nerve, persistant median artery, carpal tunnel syndrome