Colorectal cancer is a malignant lesion that occurs in the mucosal epithelium of the large intestine under the action of various carcinogenic factors such as environment or genetics, with poor prognosis and high mortality rate. Malignant tumors of the colon originate from the mucosal epithelium or submucosal mesenchymal tissue. Among them, malignant tumors occurring from mucosal epithelium are collectively called colorectal cancer, which is the most common malignant tumor of gastrointestinal tract. Those originating from mesenchymal tissues are called sarcoma, which accounts for about 1% of malignant lesions in the colon, mainly malignant lymphoma, and rarely smooth muscle sarcoma, fibrosarcoma, angiosarcoma, etc. Colorectal cancer is extremely harmful and has a high incidence, but it may not be an incurable disease. For the treatment methods of colorectal cancer, surgery is still the main treatment and targeted comprehensive treatment. Early stage treatment is very effective, mid-stage surgery-based comprehensive treatment is also good, while advanced patients need to take some radiotherapy methods to complement the comprehensive treatment of surgery. The incidence of colorectal cancer is really high, but don’t be too alarmed once you get sick. With the development of medicine, the improvement of colon cancer screening methods (colonoscopy, etc.) has increased its early detection rate and reduced the difficulty of treatment. Meanwhile, according to reliable surveys, the survival rate of late stage colon cancer patients can reach about 60% on average, and even the very late stage can reach more than 30%. In addition, the progress of colorectal cancer treatment level makes its treatment effect more obvious. Don’t worry too much, which may affect the effect of colon cancer treatment, but put your mind at ease, trust doctors’ medical skills and believe that you can overcome the disease.