Proceedings: Changing patterns of colorectal carcinoma.
D003110:Colonic Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008207:Lymphatic Metastasis; D011351:Proctoscopy; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D012811:Sigmoid Neoplasms / Q000175:diagnosis / Q000453:epidemiology; D012812:Sigmoidoscopy; D014481:United States