1、 Colon Ca incidence: 105,500/US/yr Colon Ca mortality: 48,100/US/yr implies 45% colon Ca case mortality Rectal Ca incidence: 42,000/US/yr Rectal Ca mortality: 8,500/Us/yr implies 21% rectal Ca case mortalityEpidemiology3Characteristics in chinaYoungLower locationulcerationEthiology Dietary habits Pr
2、ecancous diseases Environment factors Heredity factors Other factorsDietary habitHeredity factors Adenomatous polyposis syndromes (APS) Hereditary “Non-polyposis” Colon Cancer(HNPCC, Lynch syndrome) Familial Adenomatous Polyposis (FAP)Other factorsAnatomyArterial supply of the colon Ileocolic artery Right colic artery Meddle colic artery Left colic artery Sigmoid arteriesVenous drainage of the colon Superior mesenteric vein Inferior mesenteric vein Splenic vein Hepatic portal vein
