Bilateral carpal tunnel syndrome with anomalous palmaris profundus tendons.

This report presents the case of a 44-year-old man who presented with elective bilateral carpal tunnel decompression. At the operation, he was found to have bilateral palmaris profundus tendons within the carpal tunnel, impinging on the median nerve. In releasing both carpal tunnels, the patient's symptoms were alleviated and there was regain of full function. There have been very few documented cases of these anomalous tendons implicated in carpal tunnel syndrome and this case highlights how such anatomical variations are important in the surgical approach to carpal tunnel decompression.