MT in medicine generally refers to metastatic tumor, i.e. the tumor is metastasized from other sites. The clinical stage of patients mostly belongs to stage IV, that is, advanced stage, and it is almost impossible to be cured. The main purpose is to improve the patient’s symptoms and prolong the patient’s life. The main purpose is to improve the patient’s symptoms and prolong the patient’s life. The treatment in this period is mainly systemic treatment, such as chemotherapy, immunotherapy, targeted therapy, Chinese medicine treatment and other methods according to the pathological type of the primary tumor. If the metastatic tumor is small and solitary, it is possible for the patient to survive for a long time or even be cured after surgical resection.