Hydatid disease of skeletal muscle is a rare Size Max X entity.Liver followed by lung are the most common sites of hydatid cyst.Incidence of unusual sites which include spleen, kidney, mesentry, ovary, brain, skeletal system is 7,8 %.Skeletal muscle has the lowest incidence of primary hydatid among the unusual sites.
Here we report a young female with rare primary hydatid disease Playground of left posterior thigh extending into popliteal fossa.