School ager with 3 days of abdominal distension Pediatric Imaging Surgical-Pathological-Clinical March 4, 2023October 25, 2022 AP (above) and lateral (below) clinical images show the abdomen to be distended with superficial collateral veins. A large mass was palpable. A fluid wave was present, along with tympany. The diagnosis was ovarian endodermal sinus tumor. Related Published March 4, 2023October 25, 2022