Bowel within bowel with target sign and appearance consisting of a distended bowel segment with double lumen and intraluminal mesenteric fat and vessels that were pulled inwards by the intussuscepting segment. The affected segment appears to be a small bowel, most likely an ileal loop. No underlying pathology, such as enlarged lymph node, polyp or mass, could be identified in this CT study as a leading point to the intussusception. The bowel is not obstructed.