Combination of Cryosurgery and NK Immunotherapy for Tumors in Transplanted Liver

Inclusion Criteria: * All standard therapies have failed according to NCCN guidelines or the patient refuses standard therapies after cancer recurrence * Body tumor 1-6, the maximum tumor length \< 5 cm * KPS ≥ 70, lifespan \> 6 months * Platelet count ≥ 80×109/L，white blood cell count ≥ 3×109/L, neutrophil count ≥ 2×109/L, hemoglobin ≥ 80 g/L Exclusion Criteria: * Patients with cardiac pacemaker * Patients with brain metastasis * Patients with grade 3 hypertension or diabetic complication, severe cardiac and pulmonary dysfunction