Figure 2. Lymphoma of the ileocaecal valve presenting as intussusception. A 56-year-old woman with abdominal pain of several weeks' duration. (a) CT image through the mid abdomen (parallel to the axis of the intussusception) shows an elongated mass lesion. A central sliver of contrast medium (arrow) represents the intussuscepted bowel loop, surrounded by mesenteric fat and the walls of the intussuscipiens. (b) Image 2 cm caudal to (a). A ring-shaped mass is now seen in the left midabdomen, with a thick soft tissue density representing opposing bowel walls. Mesenteric vessels course within the central low density mesenteric fat (arrow). Colocolic intussusception was found at surgery.
