PMC5365302_01
An abdominal plain film on the day of the acute episode revealed diffuse gaseous dilatation of colonic loops (A) and small bowel gas pattern (B).
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Ultrasonography and plain abdominal film suggested a diffuse colonic distention (Figure 1).
A flexible sigmoidoscopy revealed diffuse mucosal hemorrhage (A and B), marked edema (C) with friability in the rectal mucosa (D) after rectal administration of 5 mL of 35% hydrogen peroxide.
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A flexible sigmoidoscopy was performed to assess the severity of the mucosal injury; it showed diffuse mucosal hemorrhage and marked edema with friability in the rectal mucosa (Figure 2).
A photomicrograph of esophageal mucosal biopsy demonstrated surface erosion (A), lymphocyte aggregation (B and C) with sloughing (D)) in the sigmoid colon and rectal mucosa (H&E stain). H&F, hematoxylin and eosin.
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Pathologic findings revealed erosion of the surface and sloughing with lymphocyte aggregation (Figure 3).