A computed tomography (CT) scan of the abdomen. (a) Axial CT scan at level of iliac crests shows a longitudinal sectional image of the intussusception. A portion of the terminal ileum is inside the cecum and far from the invaginated ileal mesentery that separates the walls of the two bowel segments (arrow). (b) Cross-sectional image of the midportion of intussusception (arrow) illustrates small bowel invagination through the ascending colon just above the cecum (target sign). These findings are consistent with ileocolic intussusception.
