Primary Muscular Hydatid Cyst: A Rare Occurrence.

Hydatid disease is a parasitic infection caused by tapeworm echinococcus. The muscular localization of the hydatid cyst is extremely rare, usually secondary to hepatic or pulmonary disease and often clinically mistaken as soft tissue mass. Primary muscular hydatid cyst comprises less than 0.5 % of the cases. Preoperative diagnosis is mandatory to avoid surgical contamination or future accidents.