Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 49 10 2011 10 15 694 696 EN Shohre Alimohamadi Department of Obstetrics and Gynecology, School of Medicine, HamadanUniversity of Medical Sciences, Hamadan, Iran. Arash Dehghan Department of Pathology, School of Medicine, HamadanUniversity of Medical Sciences, Hamadan, Iran. Nosrat Neghab Department of Obstetrics and Gynecology, School of Medicine, HamadanUniversity of Medical Sciences, Hamadan, Iran. 2015 09 28 Hydatid disease, caused by Echinococcusgranulosus, is a common parasitic infection of the liver. Disseminated intra-abdominal hydatid disease may occur with the rupture of the hydatid cyst into the peritoneal cavity, producing secondary echinococcosis. But primary hydatid cyst in the pelvis is rare. We report a case of bilateral hydatid cyst of the pelvis in a 53years old woman presented with adnexal cystic mass. https://acta.tums.ac.ir/index.php/acta/article/view/3821 https://acta.tums.ac.ir/index.php/acta/article/download/3821/3796