Zoledronic Acid in Decrease the Lung Metastatic Rate of Osteosarcoma

Inclusion Criteria: * Patients with osteosarcoma who were diagnosed with initial pathology and pathology were excluded from lung metastasis or other metastatic lesions by CT and total body emission-computed tomography, and patients with standard chemotherapy were evaluated. Exclusion Criteria: * Pulmonary metastasis, pregnancy or lactation, renal insufficiency (creatinine clearance \<70 ml/min/1.73 m2), liver dysfunction, obvious oral disease, and unsuitable for bisphosphonate treatment after evaluation, have been found. With diseases that still require hormone therapy, abnormal blood system, heart disease