1临床资料1.1一般资料患者,男,18岁。在外院行右侧胸壁原发性骨肉瘤切除术后2年(术后接受8个疗程化疗和1个疗程放射治疗);本次入院前1年内2次出现局部复发,分别于1年前和6个月前在外院行复发肿瘤切除;2个月前在前手术部位再次出现软组织肿块。入院后,患者一般情况良好,图右1前 1 Clinical data 1.1 General information Patient, male, 18 years old. Two years after resection of primary osteosarcoma on the right chest wall of the external court (8 courses of chemotherapy and 1 course of radiotherapy after operation); local recurrence occurred twice within 1 year before admission, Tumor resection was performed 6 months earlier in the out-patient department; soft-tissue mass appeared again 2 months prior to surgery. After admission, the patient is generally in good condition, right before the figure 1