Anterior Tarsal Tunnel Syndrome: Case Report

ABS TRACT Anterior tarsal tunnel syndrome (ATTS) occurs by the compression on the deep branch of the peroneal nerve. Although the compressions of posterior tibial nerve are diagnosed easily, ATTS may be difficult to realize. A 32-year-old male patient with numbness at first and second fingers of right foot was admitted to outpatient clinic. The right extensor digitorum brevis (EDB) muscle was atrophic electrophysiologically, compound muscle action potential (CMAP) of the peroneal nerve couldn’t be obtained by recording at the right EDB muscle. Conduction speed and amplitude of right peroneal nerve recorded at tibialis anterior (TA) muscle were normal as well as the other nerve conductions of right and left lower extremities. The entrapment of the deep branch of peroneal nerve has been defined. We aimed to draw attention to this rare entrapment neuropathy by sharing a patient with weakness of foot and numbness in the first and second fingers of the foot.