[Anal polypoid tumor formation as the form of presentation of rectal gastric heterotopia].

Heterotopic gastric epithelium occurs in all portions of the alimentary tract, but it is extremely rare in the rectum. The authors report the finding of a pedunculated anal polyp in a 9-year-old girl with a six-month history of rectal bleeding. Microscopically, the polyp consisted of epithelium of the fundic type. Both the age of the patient and the finding of heterotopic epithelium of the fundic type alone supports a congenital malformation and not an inflammatory condition.