Rectal localized giant inflammatory polyposis with indeterminate colitis.

Only two cases of rectal giant inflammatory polyposis with ulcerative colitis have been reported in the English literature and both concern children. This is the first report of a case of localized giant inflammatory polyposis of the rectum in an adult with indeterminate colitis. A 71-year-old man underwent sigmoidectomy due to stenosis of the sigmoid colon. Final histological diagnosis was indeterminate colitis. Three years following the first operation, a rectal tumor with giant polyposis was observed, and abdominoperineal resection was performed. Macroscopic and microscopic examination indicated a localized giant inflammatory polyposis of the rectum.