Primary Pelvic Hydatid Cyst Mimicking an Ovarian Neoplasm: a Diagnostic Dilemma.

Primary pelvic hydatidosis is a rare finding (incidence 0.2-2.25%). An 80-year-old, P6L6, lady presented to our hospital with complaints of PMB and abdominal pain of 5 days with a radiological diagnosis of an ovarian tumor. On pervaginal examination, a firm mobile mass of 6 × 6 cm was palpated in the anterior fornix. Suspecting torsion, semi-elective laparotomy was performed. A mass of 6 × 6 cm was seen arising from the pelvis, adherent to bowel loops, omentum, and bladder peritoneum. Hysterectomy with bilateral salpingo-oophorectomy was performed. No evidence of hydatid cyst was found in liver or any other organs. Final HP report was consistent with ovarian hydatid cyst.