Surgery is possible for cancer, and surgical treatment is still one of the several major treatments for cancer. In early stage cancer, before distant organ metastasis occurs, surgical resection is the fastest way to remove tumor cells from the body, and some very early stage cancers can even be cured by surgical treatment alone. Even if the cancer is advanced and metastasis has occurred in distant organs, palliative surgery still has a certain status and scope of application. However, some advanced cancer patients, who are generally in very poor condition and cannot tolerate surgery, should not undergo surgery at this time, and surgery will instead speed up the death of the patient. In addition, cancers of the blood system, such as leukemia and lymphoma, cannot be treated by surgery because the tumor cells exist in the hematopoietic system and circulate throughout the body with the blood.