Abstract
Tarsal tunnel syndrome (TTS) causes pain and paresthesias in the foot and ankle and is due to entrapment of the tibial nerve in the fibro-osseous tarsal tunnel under the flexor retinaculum. The most helpful diagnostic criteria are a positive Tinel's sign at the ankle and objective sensory loss in the territory of any of the terminal branches of the posterior tibial nerve. The diagnosis of TTS is confirmed by the nerve conduction study: prolonged terminal latency in 44% of cases and abnormal mixed and sensory nerve conduction in 86% and 94% of cases, respectively. Better surgical outcome was noted in symptomatic cases due to ‘mass.’
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