Duodenal intussusception secondary to ampullary adenoma: A case report

Figure 1 Abdominal computed tomography on admission. A: Axial computed tomography (CT) shows a 4.5 cm tumor at the proximal jejunum (white arrow); B: The CT beam is parallel to the longitudinal axis of the prolapsed tumor (dotted line in A). The whole structures surrounding the ampulla, including the common bile duct (black arrow) and the major pancreatic duct, deviate toward the left-lower direction. The tumor is located on the proximal jejunum (white arrow). The intussusception is not observable.