Median Nerve Trifurcation.

Median nerve trifurcation in the carpal tunnel has only rarely been described and never reported to be found at surgery. We present the first such case, highlighting a median nerve trifurcation found at carpal tunnel release. Consideration of amendment of the Lanz classification should be made to account for such cases, and surgeons should be aware of possible anatomical variations to avoid iatrogenic injury.