For malignant tumors, immune cell therapy is the most advanced medical technology other than conventional surgery, chemotherapy and radiotherapy. Conventional surgical treatment is limited and could not be performed when the tumor growth site could not be surgical resected (such as blood cancer and brain cancer, etc.) or the existing examination technology could not detect the presence of cancer cells. The limitations of radiotherapy are similar to those of surgical treatment, and the subject is also limited to patients who have localized and precise defined tumor sites. As for chemotherapy, although improving the limitations of surgery and radiotherapy, but the lack of specific chemotherapeutic drugs in cancer cell removal, it will also attack normal cells, not only reducing the patient's immunity, but also encountering extremely uncomfortable side effects.

The use of chemotherapy drugs is more likely to lead to cancer drug resistance, which has impact on efficacy for recurrence treatment. Immunotherapy is the treatment of autologous immune cells, and is considered to be the most likely method to compensate for the lack of conventional surgery, chemotherapy, and radiotherapy.