an unusual localization of hydatid cyst in a patient with

abstracthydatid disease is a widespread parasitic infection caused by tapewormechinococcus and it affects mainly the liver, but other organs such as pelvic organscould be involved very rare. here we report a case of hydatid cyst with involvementof oviduct in a woman with endometrial cancer. it was misdiagnosed as a multicysticright ovarian mass before surgery and by microscopic study it was shown as a primarydegenerated hydatid cyst which was also unusual. although pelvic echinococcalcysts rarely occur, the gynecologists should be consider, and the possibility of ahydatid cyst when they find a pelvic cystic mass, especially in areas where the diseaseis endemic.