[Primary hydatid cyst in the medial thigh: case report].

Hydatid cyst is a zoonotic infection most frequently caused by Echinococcus granulosus. Humans can be intermediate hosts in the hydatic cyst infection. In humans, the most common location sites for hydatic cysts are the liver followed by the lungs. Primary muscle involvement located in the skeletal muscle is very rare. In this article, we present a 24-year-old male patient with primary hydatic cyst located in the medial thigh. A multilocular cystic mass was detected in the magnetic resonance imaging taken with a pre-diagnosis of soft tissue mass. Patient was treated with surgical excision and antihelmintic drug. Primary hydatic cyst should be considered in the differential diagnosis of soft tissue masses in endemic regions including our country.