Polyp of gastric bowel path sees more at colon, can have black mix bellyacke, polyp of a few bowel is likely canceration, but oral cavity ill caustic is not had hinder.

• 胃肠道息肉多见于结肠，可有黑便和腹痛，少数肠息肉可能癌变，但口腔病损无碍。