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Orthop Traumatol Surg Res. 2010 Nov;96(7):829-31. doi: 10.1016/j.otsr.2010.03.026. Epub 2010 Sep 18.

Tarsal tunnel syndrome and flexor hallucis longus tendon hypertrophy.

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Andres Caceres Avenue, 96B, Chiclayo City, Peru.


Tarsal tunnel syndrome (TTS) defines an entrapment neuropathy of the posterior tibial nerve or one of its branches, within the tarsal tunnel. Numerous etiologies have been described explaining this entrapment, including trauma, space-occupying lesions, foot deformities, etc. We present an unreported cause of a space-occupying lesion in the etiology of TTS, namely the combination of a hypertrophic long distally extended muscle belly of the flexor hallucis longus and repetitive ankle motion. Surgical debulking of the muscle belly in the posterior ankle compartment resolved all symptoms.

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