Tumors were observed at distal femurs in 80 patients (47%), proximal tibia in 51 (30%), proximal humors in 10 and other locations in 22.

• 施行术前化疗-手术切除肿瘤-术后化疗综合治疗(综合治疗组)104例，单纯手术切除肿瘤(非综合治疗组)66例；