Combinations Natural Killer Cell (NK) With chemotherapy treatment may enhance the immune response and stop cancer cells from growing.

Patients in group A will receive 4 cycles of NK treatments within 8 months. Patients in group B will have no immunotherapy. Chemotherapy are available in both groups.The investigators want to evaluate the efficacy of combination of NK with chemotherapy in patients with treatment-refractory solid tumors

Inclusion Criteria:

1. Patients with treatment-refractory advanced solid cancer can not accept operation;
2. Age 10 to 90 years;
3. Eastern Cooperative Oncology Group (ECOG) score ≤ 2 points;
4. estimate survival > 3 months;
5. Blood White Blood Cell(WBC)≥ 4×109/L, Hb ≥ 100g/L, Platelet Count (PLT)≥ 80×109/L; Alanine amino transferase (ALT) and aspartate amino transferase (AST)≤ 2 times of normal upper value; Serum Cr ≤ 2 normal upper value;
6. Without any other malignant disease;
7. With more than one scalable lesions;
8. Patients Voluntary attempt, and informed consent;
9. Women of child-bearing potential must have a negative pregnancy test because of the potentially dangerous effects of the preparative chemotherapy on the fetus.

Exclusion Criteria:

1. Patients who do not conform to the inclusion criteria;
2. Patients with uncontrolled infection; underlying disease that was severe or life-threatening (such as uncontrolled brain metastasis );
3. Patients who were pregnant or lactating;
4. ECOG perform status ≥ 2;4.
5. Other situations that the researchers considered unsuitable for this study (such as mental illness, drug abuse, etc.)