Figure 5. Jejunojejunal intussusception caused by a tube. A 22-year-old man with a head injury. A feeding tube was inserted via jejunostomy. Abdominal pain subsequently occurred. CT at the level of the lower abdomen shows a round, target-shaped mass in the left abdomen (arrow). The mass consists of a central hyperdense focus (the tube), a "half-moon" shaped hypodense area medial to it, the intussuscepted mesenteric fat and a soft tissue rim representing the opposing walls of the intussuscipiens and the intussusceptum.
