Hydatid disease is a widespread parasitic infection caused by tapeworm
Echinococcus and it affects mainly the liver, but other organs such as pelvic organs
could be involved very rare. Here we report a case of hydatid cyst with involvement
of oviduct in a woman with endometrial cancer. It was misdiagnosed as a multicystic
right ovarian mass before surgery and by microscopic study it was shown as a primary
degenerated hydatid cyst which was also unusual. Although pelvic echinococcal
cysts rarely occur, the gynecologists should be consider, and the possibility of a
hydatid cyst when they find a pelvic cystic mass, especially in areas where the disease
is endemic.