Tarsal tunnel syndrome caused by strain of an anomalous muscle: an MRI-specific diagnosis.
Tarsal tunnel syndrome (TTS) is a compression neuropathy of the posterior tibial nerve in the ankle, commonly caused by a mass lesion such as ganglion, tumor, fracture, or post-traumatic fibrosis. Although anomalous muscle is relatively common in the ankle, there has been only one report to date implicating it in TTS. This case demonstrates MR findings of a strained flexor digitorum accessorius longus muscle as an unusual cause of TTS.
Department of Radiology, University of California at San Francisco 94143.
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D000328:Adult; D016512:Ankle Injuries / Q000150:complications / Q000175:diagnosis; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009132:Muscles / Q000002:abnormalities*; D013180:Sprains and Strains / Q000150:complications*; D013641:Tarsal Tunnel Syndrome / Q000175:diagnosis* / Q000209:etiology*