Cancer is a generic term for a large group of malignant tumors. Generally speaking, the folklore of cancer staging is divided into early, intermediate and late stages. In medical science, there are also TNM stages, which are recommended by the World Health Organization for most tumors: stage I, which is early stage; stage II and stage III, which are intermediate stage; stage III, which may be intermediate and late; stage II, which is intermediate and early; and stage IV, which is advanced stage, that is, widespread metastasis, or lesions with severe spread and infiltration, which is very advanced. Different stages may have different treatment methods and prognosis. Early stages are generally treated surgically with good results, and some do not require radiotherapy after surgery. For those who can be treated surgically in the middle stage, surgery is usually done for radical treatment, and adjuvant radiotherapy is needed after surgery. If it is stage IV, there is generally no chance of surgical treatment, but only palliative radiotherapy, chemotherapy or targeted drugs can be done to control the development of the disease.