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Localized giant pseudopolyposis of the colon.

Localized giant pseudopolyposis is a rare complication in patients with inflammatory diseases of the colon which produces a huge intraluminal polypoid mass. Examples are described in a child with chronic ulcerative colitis in whom the lesion filled the rectum and in an adult with recurrent granulomatous ileocolitis in whom the mass was present in the transverse colon adjacent to a stenotic anastomosis. The clinical presentation, radiologic features and pathologic findings of this unusual sequela to inflammation are reviewed.