Tumor staging nowadays mostly adopts the World Health Organization’s classification method, based on the TNM stage of tumor, that is, according to the extent of primary tumor, whether regional lymph nodes metastasis and whether there is distant metastasis, tumors are divided into a total of four stages, using Roman letters as stage I, II, III and IV. 1. Stage I tumor: The maximum diameter of stage I tumor is between 3-4 cm, generally no regional lymph node metastasis will occur, and there is no distant metastasis. There is no distant metastasis, and the tumor can invade few surrounding tissues. Stage II tumor: The maximum diameter of stage II tumor is 4-7cm, the tumor can invade the surrounding organs, and local lymph node metastasis can occur, but no distant metastasis will occur. The differentiation is moderate, nuclear division is easy to see, and it is moderately malignant. 3. Stage III tumor: The diameter of stage III tumor is larger, the largest can be more than 7cm, and it can invade most tissues and organs around the tumor, and the lymph node metastasis on the opposite side of the lesion can occur, but there is no distant metastasis. At this time, differentiation is poor, nuclear division is more, and it is highly malignant; 4. Stage IV tumor: the size of stage IV tumor is not a criterion for judgment, and regional lymph node metastasis is also more serious, the most serious case is single or multiple organs with multiple metastases, which may not show differentiation tendency and is highly malignant. At present, the treatment of tumor is based on the principle of staging, early stage usually takes radical surgery, and locally advanced and metastatic tumors are mainly treated with systemic drug therapy, which can also be combined with local treatment.