Generally speaking, if low-grade malignant tumors are detected early and diagnosed early, actively operated, and integrated radiotherapy and chemotherapy after operation, the 5-year survival rate is higher, and even clinical cure can be achieved. On the other hand, if low-grade malignant tumors are detected late, patients with late-stage tumors have poor efficacy and lower 5-year survival rate. Low-degree malignant tumors are more differentiated and less malignant, so theoretically, the 5-year survival rate of low-degree malignant tumors after treatment is higher than that of intermediate and highly malignant tumors. However, in reality, the therapeutic effect of tumor is affected by many factors. If early cancer, whether low malignancy or high malignancy through early radical surgical treatment, the tumor will be completely removed, most of the patients can survive up to 5 years or more, that is, clinically said to be cured; low malignant tumors, if found late, the tumor progressed to the middle or late stage, lymph node metastasis or distant organ metastasis, even if through surgical treatment, the surgery is coupled with chemotherapy, radiotherapy, immunotherapy, targeted therapy, biological therapy, etc., the 5-year survival rate is still low, and the possibility of clinical cure is relatively small, which can only prolong the patient’s life. In addition, whether the patient can be treated by surgery, whether the patient has standardized anti-tumor treatment after surgery, the dietary and nutritional status after surgery, and the patient’s psychological factors also have an impact on the prognosis.