We report a rare muscular variation in which some accessory tendons were connecting the flexor pollicis longus and flexor digitorum profundus. The common tendon formed by the joining of the accessory tendons from these muscles was inserting into the tendon of the index finger of flexor digitorum profundus. The surgical anatomy of this variation is important for the orthopedic surgeons since such a variation can cause chronic inflammation, nerve compressions, tenosynovitis and may require surgical excision.
