NK Cells Infusion for Advanced Malignancies

Inclusion Criteria: 1. Patients with advanced malignant tumors diagnosed by pathological histology and/or cytology who have failed multi-line therapy and have no standard treatment method are unable to undergo surgery, radiation therapy, or chemotherapy; 2. Age 18-75 years old (≥18, ≤75); 3. ECOG: 0-1; 4. Priority should be given to the inclusion of ovarian cancer, malignant leukemia, lymphoma, etc. that have been shown to respond well to NK cell therapy; 5. Expected survival period ≥ 3 months; 6. Hematology tests also meet the following requirements: 1\) WBC≥3×109/L, ANC≥1.5×109/L, Hb≥90g/L, PLT≥100×109/L; 2) TBIL ≤ 1.5 × ULN (normal upper limit), ALT and AST ≤ 2 × ULN (if there is liver metastasis, then ≤ 5 × ULN); 3) Endogenous creatinine clearance ≥ 60 ml/min (calculated based on Cockcroft-Gault formula); (7) Length of solid tumors do not exceed 6 cm; (8) Signing of informed consent from each patient Exclusion Criteria: 1. History of other malignancies with a disease-free period \<5 years (except for cured basal cell carcinoma of the skin, cured carcinoma of the cervix in situ, and gastrointestinal tumors proven to be cured by endoscopic mucosal resection); 2. Patients with brain metastases (unless the investigator believes that brain metastasis is currently stable, it is generally not recommended for enrollment); 3. Transplant recipients; 4. T-cell lymphoma patients; 5. Allergies to biologics used in this treatment; 6. Patients with HIV and syphilis; 7. HBV carriers; 8. Patients who are undergoing radiation therapy or immunotherapy within 4 weeks; 9. Patients who have undergone high-dose radiation therapy on the lung and liver within 4 months; 10. Patients with pulmonary inflammation determined by chest radiography; 11. Oxygen saturation ≤ 90% on room air; 12. Patients with cachexia caused by advanced tumors; 13. Long-term use of immunosuppressive drugs or patients who are using immunosuppressive drugs; 14. Those with serious autoimmune diseases; 15. Patients with organ failure (grade 4 of heart function; liver function with Child class C or above; brain metastasis with disturbance of consciousness; severe respiratory failure symptoms); 16. Active infections (including intra-abdominal infections). 17. Researchers consider it inappropriate to participate in the trial