A rare case of an accessory flexor hallucis longus causing tarsal tunnel syndrome.

Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons

PubMedID: 25103714

Lin D, Williams C, Zaw H. A rare case of an accessory flexor hallucis longus causing tarsal tunnel syndrome. Foot Ankle Surg. 2014;20(3):e37-e39.
Tarsal tunnel syndrome (TTS) is a rare entrapment neuropathy of the tibial nerve within the fibro-osseous tarsal tunnel for which multiple etiologies, including trauma, congenital foot abnormalities and space occupying lesions, have been described. We present an unusual case of TTS caused by an accessory Flexor Hallucis Longus (FHL) tendon. Surgical excision led to a complete resolution of symptoms and improved the quality of life of our patient.