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Objective Apoptosis related gene Bcl 2 and Bax in osteosarcoma patients with different clinical appearance were being studied to analyze the prognosis of the patients. Method The cases were divided into two different groups according to the results of the follow up.33 cases in high risk group and 18 cases in low risk group. Expression of Bcl 2 and Bax were immunohistochemically stained by ABC method. Result Positive expression rate of Bcl 2 was 61% in high risk group (20/23) and 33% in low risk group (1/8). Positive expression of Bax was 22% in high risk group (6/27) and 67% in low risk group(12/18).Conclusion Expression of Bcl 2 and Bax was related to the prognosis of osteosarcoma. Positively expressed Bcl 2 in osteosarcoma cells may indicate bad prognosis. If Bax is highly expressed in osteosarcoma cells, this may indicated a good prognosis.