Simultaneous transition of multiple polyps into carcinoma in the large intestine.
D000328:Adult; D000368:Aged; D002278:Carcinoma in Situ / Q000209:etiology* / Q000473:pathology; D002471:Cell Transformation, Neoplastic; D005260:Female; D006801:Humans; D007414:Intestinal Neoplasms / Q000150:complications* / Q000209:etiology / Q000473:pathology; D007417:Intestinal Polyps / Q000150:complications* / Q000473:pathology; D007420:Intestine, Large / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology