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Figure 11b: Transverse CT images in a 31-year-old man with amebiasis who had a history of diarrhea and recent travel to North Africa. (a) Cecal wall is thickened (arrow), but terminal ileum (arrowheads) is not involved. (b) Hepatic flexure (arrows) also demonstrates marked thickening, but descending colon (arrowhead) appears normal.