Images in GI Infection: Common Cyst at an Uncommon Location: Hydatid Cyst of Lesser Omentum

Hydatid disease is a parasitic disease caused most commonly by the tapeworm Echinococcus granulosus. Treatment options can range from observation to radical excision of the cyst. The most common site is the liver, and the most common extra-hepatic location is the lung. We present a rare case of a 22-year-old male, who presented with complaints of right upper quadrant abdominal pain for a duration of 3 months, which on evaluation was associated with eosinophilia and radiological imaging revealed an extra-hepatic hydatid cyst arising from the lesser omentum. Pericystectomy was performed, and the postoperative course was grossly uneventful. The cut section of the cyst and the final histopathological study confirmed the diagnosis. There are very few case reports in the literature of isolated omental hydatidosis, and we present one such unique case.