We report a case of an eighteen month old female child, who presented with abdominal pain, swelling and failure to thrive with history of blunt trauma abdomen in road traffic accident, two months back. Ultrasonography and computed tomography scan (CT scan) whole abdomen, showed a large cystic swelling behind and inferior to liver with collection in lesser sac. External drainage was done after aspiration of cyst having volume of 1500 mL which was bile stained, with successful outcome.