The degree of malignancy of cancer is not related to the clinical stage, which is determined by the pathological typing of cancer, while the clinical stage is related to the size of the lesion, depth of infiltration, lymph node metastasis and distant metastasis. Pathologic typing of cancer is the classification of cancer cells into different pathological types under microscope according to different characteristics. Some pathologic types are highly malignant and invasive, and patients can progress to advanced stages in a short period of time, which ultimately leads to death. Less malignant tumors have a better prognosis and slower progression. The clinical staging of cancer is generally based on the size of the tumor, the depth of infiltration, the presence or absence of lymph nodes or distant metastasis, and it is usually divided into four stages. The later the staging, the more serious the tumor infiltration, proliferation, and metastasis are, the worse the therapeutic effect is, and the worse the prognosis is. Pathological staging and clinical staging of malignant tumors are both crucial to the treatment of patients, but staging is more important than staging.