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Acute high-grade small bowel obstruction secondary to stricturing of the terminal ileum. The terminal ileum is thickened and hyperenhancing over a length of 5 cm. The caecum is collapsed and not thickened, and is in a normal position. Two other foci of small bowel thickening and luminal narrowing are present upstream, each approximately 1 cm in length, although this may represent spasm. No other segments of bowel are similarly affected. A few small mesenteric lymph nodes are present but no bulky or necrotic nodes. A small volume of free fluid is present in the pelvis. Extensive nodularity is seen at the lung bases.