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Introduction: Hydatid disease is a parasitic infection caused by Echinococcus granulosus. The disease is found most commonly in the liver and lungs, but no organ is immune. Patients with hydatid cysts at unusual locations present with atypical presentations and pose a diagnostic dilemma. Case presentation: A 25-year-old woman presented with complaints of pain in the lower abdomen. Ultrasonography revealed cystic disease of the ovary. An exploratory laparotomy was done and the ovary with the cyst was removed. The diagnosis of hydatid cyst was confirmed on histopathology. Conclusion: Primary involvement of the pelvic organs, especially the ovary, is very rare in hydatid disease. A high index of suspicion is required in order to make a correct diagnosis pre-operatively to prevent spillage of the cyst contents during surgery.