Preschooler with recurrent abdominal pain

CT and US of recurrent ileocolic intussusception caused by juvenile polyps
Axial CT with contrast of the abdomen (above) at initial presentation shows a large round soft tissue mass in the region of the ascending colon that has alternating circles of soft tissue density and fat density which give it a target sign appearance. Transverse US of the abdomen obtained two weeks later (below) shows recurrence of a nearly identical appearing soft tissue mass in the region of the ascending colon that has alternating circles of decreased and increased echogenicity giving it a target sign appearance.

The diagnosis was initially ileocolic intussusception which had been reduced successfully but had recurred two weeks later and which again was reduced successfully. Surgical exploration subsequently revealed multiple juvenile polyps acting as the lead point for the recurrent ileocolic intussusception.