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Colon cancer is a common malignant tumor of digestive tract occurring in the colon. The incidence of gastrointestinal tumors ranked third. Colon cancer is mainly adenocarcinoma, mucinous adenocarcinoma and undifferentiated carcinoma. The gross shape is polyp, ulcerate type, etc. Colon cancer can develop circumferentially along the intestinal wall, spread up and down along the longitudinal diameter of the intestinal canal or infiltrate deep into the intestinal wall. In addition to lymphatic, blood flow metastasis and local invasion, it can also spread to the abdominal cavity or along the suture and incision surface. Patients with chronic colitis, colon polyp and male obesity are susceptible groups.