Pseudo-carcinomatous invasion in a rectal polyp.
D000236:Adenoma / Q000473:pathology*; D000368:Aged; D002277:Carcinoma / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007417:Intestinal Polyps / Q000473:pathology*; D008297:Male; D009361:Neoplasm Invasiveness; D012004:Rectal Neoplasms / Q000473:pathology*