PMC4748196_01
CT showing a small abscess (arrow) and thickened sigmoid colon wall with adjacent inflammatory changes (asterisk).
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F1
Abdominal computed tomography (CT) demonstrated bowel wall thickening and fat stranding from the sigmoid colon to the rectum consistent with colitis, as well as a small perisigmoid abscess (Figure 1).
Increased size of the abscess (arrow) with increased surrounding inflammatory changes.
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F2
Repeat CT demonstrated significant interval enlargement of the abscess (Figure 2).
Sigmoidoscopy showing (A) cobblestoning of the sigmoid colon, (B) sigmoid colon ulceration, (C) descending colon with normal proximal mucosa and ulcerated distal descending colon, and (D) ulcers in rectum with adjacent normal-looking mucosa.
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F3
Sigmoidoscopy demonstrated cobblestoning and friability in the sigmoid colon with ulcerated lesions in the descending colon and rectum (Figure 3), concerning for Crohn's disease.