Linburg-Comstock variation: histoanatomy and classification of the connection between flexor pollicis longus and flexor digitorum profundus to the index finger.

This study provides a detailed anatomo-histological description of the interconnection between flexor pollicis longus and flexor digitorum profundus to the index finger. Its etiology could either be congenital or secondarily acquired. Surgeons should be aware of this connection for better diagnosis, surgical planning and treatment of diseased hands.