Stage III bowel cancer is the result of pathological diagnosis, which means that the tumor in the patient’s intestine has led to metastasis in the peri-intestinal lymph nodes, such as the mesenteric lymph nodes or the lymph nodes of the root of the mesentery. As long as positive lymph nodes are found during pathological examination, it is usually judged as stage III, regardless of the depth of intestinal tumor invasion. In addition, other tests are needed to find out whether there are distant metastases, such as liver metastases or lung metastases or peritoneal implant metastases. If there is distant metastasis, it is usually confirmed as stage IV. For stage III bowel cancer, chemotherapy is usually required after surgery, and patients need to go to the hospital for regular review, mainly to prevent tumor recurrence or metastasis.