Abstract
Like many agricultural countries, cystic echinococcal zoonotic disease is endemic in Nepal. Incidence of hydatid cyst in liver and lungs are common among the adult population but hydatid cyst of the uterus is an extremely rare entity. We report a case of a 76-year-old menopausal lady who presented with lower abdominal pain for 4 months and underwent laparotomy for provisional diagnosis of myometrial cyst, as shown by MRI scan, however the cyst was found to be primary hydatid cyst of uterus. Postoperatively serological test for hydatid cyst was positive for echinococcus granulosus, further confirmed by histopathological diagnosis. Hence in endemic areas like ours, there should be high index of suspicion of the possibility of hydatid cyst as a differential for cystic pelvic masses.