Accessory Flexor Digitorum Longus Presenting as Tarsal Tunnel Syndrome: A Case Report

The flexor digitorum accessory longus (FDAL) muscle is one of the most commonly encountered anomalous muscles in the foot and ankle. Literature has documented the prevalence of the FDAL anywhere from 4% to 12%, based on cadaveric limb dissection. The variability of the origin, insertion, size, and location of the FDAL muscle can cause a wide array of foot and ankle pathologies, most notably, tarsal tunnel syndrome and flexor hallucis longus syndrome

The flexor digitorum accessory longus (FDAL) muscle is one of the most commonly encountered anomalous muscles in the foot and ankle. Literature has documented the prevalence of the FDAL anywhere from 4% to 12%, based on cadaveric limb dissection. The variability of the origin, insertion, size, and location of the FDAL muscle can cause a wide array of foot and ankle pathologies, most notably, tarsal tunnel syndrome and flexor hallucis longus syndrome

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Accessory Flexor Digitorum Longus Presenting as Tarsal Tunnel Syndrome: A Case Report