Fat containing Hydatid cyst in the pelvic cavity mimicking ovarian dermoid cyst: A Case Report

The common etiology of hydatid cysts in the world is Echinococcus granulosus. The first organ that is usually involved is liver, and the common GI manifestations are abdominal pain, hepatomegaly, anorexia, vomiting and jaundice. Pelvic cavity is rarely involved initially and the symptoms that patients often present are because of the pressure to adjacent organs such as bladder or rectum and bowel.

A 22 years old woman with anorexia and hypogastric pain was admitted in Imam Reza hospital in Mashhad. In abdominopelvic sonography, a cystic lesion with fine septa and low level echoes was seen in pelvic cavity and in CT scan a cystic lesion with fat density was seen in pelvic cavity. The patient was taken to operating room with possibly diagnosis of dermoid cyst of left ovary, but during operation, hydatid cyst was seen in pelvic cavity and was confirmed by pathology.

In endemic countries for hydatid disease, the hydatid cyst should be considered in differential diagnosis of any cystic lesion in any organ.