Sigmoid colon cancer is included in the scope of colon cancer, which is a type of colon cancer and belongs to malignant tumor, and this kind of disease is serious. Colon cancer is a malignant tumor originated from epithelial cells of colon mucosa, which is one of the common malignant tumors in gastrointestinal tract, and can occur in cecum, ascending colon, transverse colon, descending colon and sigmoid colon. If patients can be detected, diagnosed and treated early, the survival rate of early colon cancer patients is generally high, and the five-year survival rate (commonly used in the clinic to roughly assess the survival of patients with tumors) can reach about 90%, and the five-year survival rate will be greatly reduced for patients with local progression or extensive metastasis. It should be noted that colon cancer patients can reduce the adverse effects of the disease through “early detection, early diagnosis and early treatment”, and many patients may survive for a long time, so it is recommended that patients establish confidence in treatment.