Journal of Surgery - JuniperPublishers Abstract Hydatid cyst primarily affects organs like liver and lungs. Intramuscular hydatid cysts are very rare probably because of hostile environment within the muscles. Intramuscular hydatid cysts if present are mostly secondary, resulting from the spread of cysts from other areas either spontaneously or during operations. We present an unusual case of a primary intramuscular hydatid cyst found in the right thigh of a 36-year-old man, presenting as an enlarging mass. Magnetic resonance imaging examinations revealed a multilocular intramuscular cyst in the anterior aspect of right thigh with close relation to neurovascular bundle. The entire cyst was removed surgically and histopathological examinations confirmed the diagnosis of muscular hydatidosis. In highly endemic regions, undiagnosed mass at any site should be considered a hydatid cyst until proven otherwise. Keywords: Primary hydatidosis of muscles; Femoral hydatid cyst; Intramu
