Patient: The patient is a female, 21 years old. She was diagnosed with osteosarcoma in November 2008. In January 09 went to Beijing Jishuitan for further diagnosis, the conclusion was consistent with the joint replaced in February at the Second People’s Hospital of Shanxi Province, discharged from the hospital after the removal of stitches came directly to the Provincial Cancer Hospital for chemotherapy, discharged after 6 times of chemotherapy, the doctor let go after six months to consolidate chemotherapy 3 times. I went to the hospital around November and was discharged at the end of March 2010. In September 2010, the doctor told me to go back for 3 more chemotherapy treatments. I don’t know if I still need it? Or what treatment is needed again? The treatment method varies from hospital to hospital, but in general, chemotherapy should be given first after the pathological diagnosis is clear, and then surgery should follow. Our hospital treatment is based on 3 courses of pre-operative treatment + surgery + 3-6 courses of post-operative chemotherapy. The above is for reference only.