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Variant muscles in the hamstring include some degree of fusion among them, insertion of a muscular slip into fascia of leg or into fascia of thigh and accessory heads of origin of one of the muscles. During the dissection of the cadavers, an unusual muscle was found on the left side of 50-year-old male cadaver, attached to the belly of semitendinosus and terminated as a tendon which was inserted into intramuscular tendon of medial and lateral head of gastrocnemius muscle described as ischioaponeuroticus / tensor fascia suralis.