The cure rate of medium-differentiated adenocarcinoma of the rectum is related to its pathological diagnosis, but also to its clinical stage. The clinical stage of tumor is divided into T0 stage, I stage, II stage, III stage and IV stage, as follows: 1. The five-year survival rate of stage I patients can reach 75%-80% after the tumor is cut out; 2. The five-year survival rate of stage II patients can reach about 65%; 4. The five-year survival rate of stage III patients can reach 30%; 5. Fewer stage IV patients can survive more than one year. Therefore, the cure rate of colon tumor mainly relies on clinical stage and pathological type diagnosis, and it is necessary to achieve early detection, early treatment and systematic treatment to improve the survival rate of patients.