PMC4189718_01
Ileo-ileal intussusception caused by heterotopic pancreas. CT with intravenous contrast: (A) Axial image: Distended bowel loop with intraluminal fat density (like mesentery) with target sign (arrow) suggestive of intussusception. (B) Coronal reformation image: Tubular-like structure at the right iliac fossa shows fat density within. (C) Sagittal reformation image: Ileal loop is seen invaginated into another ileal loop (arrow).
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CT enterography revealed a large circumferential lesion measuring approximately 8.0x1.8 cm involving the terminal ileum, which acted as a leading point to an ileo-ileal intussusception (Figure 1A-C).