PMC6925915_01
(a, b) Supine and upright abdominal radiographs show decreased amount of bowel gas in the lower abdomen/pelvic cavity.
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fig1
(a, b) Circumferential friability, whitish membrane, edema, erythema, and superficial ulceration of mucosa from the anus to the sigmoid colon.
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fig2
Colonoscopy showed circumferential friability, whitish membrane, edema, erythema, and superficial ulceration of mucosa from the anus to the sigmoid colon (Figures 2(a) and 2(b)).
(a, b) Slightly pale mucosa with focal area of erythema from the anus to the sigmoid colon with narrowing of the caliber of the sigmoid colon.
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fig3
Six weeks after, repeated colonoscopy showed whitish membrane, erythema, and stricture from the anus to the sigmoid colon (Figures 3(a) and 3(b)).