在我国 ,四肢骨恶性肿瘤占全部骨肿瘤及肿瘤样病变的4 1% [1] ,致残率高 ,可危及生命 ,预后差。在以往 ,骨恶性肿瘤一经确诊即采用截肢术 ,以期达到彻底根治的目的 ,但往往效果不佳 ,病死率高达 80 %～ 90 % ,且术后伤残严重 ,患者难以接受。自 2 0世纪 70年代以来 ,随着影像技 In China, malignant tumors of the limbs make up 41% of all bone tumors and tumor-like lesions [1]. With high morbidity, they can be life-threatening and have a poor prognosis. In the past, bone metastases were diagnosed using amputation to achieve the goal of radical cure. However, they often have poor results. Mortality rates are as high as 80% to 90%, and postoperative disability is severe and difficult for patients to accept. Since the 1970s, with imaging technology