To evaluate the safety and efficacy of patients with recurrent and metastatic bone tumors.

Inclusion Criteria:

1. The patient volunteered to participate in this study and signed an informed consent;
2. Pathological diagnosis of osteosarcoma, chondrosarcoma, source of undifferentiated pleomorphic sarcoma / malignant fibrous histiocytoma, derived bone giant cell tumor of bone or bone primary Ewing's sarcoma / primitive neuroectodermal tumor (PNET) tumor;
3. All patients were failed in chemotherapy (including anthracycline) or intolerance, recurrence or distant metastasis, and at least one measurable lesion (according to RECIST 1.1 criteria);
4. At the age of 14-70, less than 18 year old patients with body surface area to more than 1.5m2;
5. ECOG PS score: 0~1 score (amputation patient's PS score is 0~2), and the expected survival time is over March;
6. The main organs function within 7 days before the treatment, in accordance with the following criteria: the standard of blood routine examination (in 14 days without blood transfusion): The hemoglobin is greater than or equal to 90g/L (by multiple tumor metastasis induced anemia, hemoglobin = 85g/L); The neutrophil absolute value is more than 1.5 * 109/L; Platelet over 80 * 109/L. biochemical examination should comply with the following criteria: The total bilirubin is less than or equal to 1.5 Long ULN; The alanine aminotransferase and aspartate aminotransferase is less than or equal to 2.5ULN, such as liver metastasis, ALT and AST = 5ULN; The serum creatinine or creatinine clearance rate is greater than 1.5ULN 60ml/min; Doppler ultrasound assessment of the lower limit of normal value is more than the left ventricular ejection fraction (50%).
7. Women of childbearing age should use contraceptive measures must be agreed within 6 months in the study period and after the end of the study (such as IUD, pill or condoms); in the study before entering the group within 7 days of serum or urine pregnancy test is negative, and must be for patients with non lactation; men should agree to use contraceptive measures must be 6 months in the research period and the end of the study period after the patients.

Exclusion Criteria:

- Patients with immunodeficiency, including HIV positive or other acquired, congenital immunodeficiency disease, or organ transplant history Hypertension (systolic BP ≥150 mmHg, diastolic BP ≥90 mmHg) still uncontrollable by one medication Hepatitis B virus patients with active replication (DNA> 500 cps / mL), hepatitis C