Figure 7. Transient small bowel intussusception. A 37-year-old man with abdominal pain 3 weeks after lumbar spine surgery following a motor vehicle accident. (a) Post-contrast CT image at the level of the midabdomen shows a slightly dilated proximal small bowel loop with fatty tissue within, consistent with small bowel intussusception (arrow). (b) No intussusception was detected on a pre-contrast CT image 5 min before (a). The patient underwent another CT study 1 week later; this scan again did not demonstrate intussusception. The abdominal pain gradually subsided.
