骨盆骨肉瘤的外科治疗策略探讨

目的 探讨手术治疗骨盆骨肉瘤的切除及重建方式.方法 回顾性分析2000年6月至2009年6月接受肿瘤切除重建手术的21例骨盆骨肉瘤患者的病例资料.其中男性12例,女性9例;平均年龄30岁.肿瘤累及范围:Ⅰ区3例,Ⅰ+Ⅳ区3例,Ⅰ+Ⅱ区4例,Ⅱ+Ⅲ区4例,Ⅰ+Ⅱ+Ⅲ区1例,Ⅲ区1例,Ⅰ+Ⅱ+Ⅳ区5例.其中经典骨肉瘤19例,高分化骨肉瘤2例.21例均为ⅡB期.所有病例均行整块切除,外科边界为13例广泛切除,8例边缘切除.重建方式包括:可调式人工半骨盆假体重建13例;自体骨移植+钉棒系统重建5例;半骨盆截肢2例;单纯切除1例.患者术后平均随访时间30.3个月(6.0～87.0个月).结果 21例患者中13例存活,总体生存率为61.9%,无瘤生存率23.8%;5年生存率为44.2%.局部复发率为28.6%(6/21),其中累及Ⅱ区肿瘤复发4例(4/13),Ⅰ区肿瘤复发1例(1/3),Ⅰ+Ⅳ区肿瘤复发1例(1/3),Ⅲ区肿瘤单纯切除的1例患者及2例半骨盆截肢患者未发生局部复发.肿瘤广泛切除术后复发率为23.1%(3/13),边缘切除术后复发率为37.5%(3/8).9例患者术后出现肺转移(42.9%),1例患者发生骨及淋巴结转移.13例存活患者MSTS 93功能评分为(20.6±5.4)分.4例自体骨移植+钉棒系统内固定患者功能评分为(22.5±2.1)分;7例町调式人工半骨盆重建患者,于术后8周开始扶拐行走,半年后可去拐行走,功能评分为(17.7±5.5)分.结论 选择合适的切除与重建方式,多数骨盆骨肉瘤患者可以行保肢治疗,可保留部分肢体功能.

Evaluation of surgical treatment of pelvic osteosarcoma

Objectives To investigate the clinical outcome of consecutive pelvic osteosarcoma treated with surgery and chemotherapy in a single institution, and to discuss the surgical strategy, resection and reconstruction. Methods Twenty-one consecutive cases with pelvic osteosarcoma underwent surgical procedures between June 2000 and June 2009. There were 12 male and 9 female with a mean age of 32 years. According to Enneking and Dunham pelvic classification system, type I was 3 cases, type I + IV 3 cases,type I + Ⅱ 4 cases,type Ⅱ + Ⅲ 4 cases,type I + Ⅱ + Ⅲ 1 case,type Ⅲ 1 case,and type I + Ⅱ + Ⅳ 5 cases. Among the 21 cases, 19 were diagnosed as classical osteosarcoma and 2 were diagnosed as low-grade pathologically. All the tumors were stage Ⅱ B. All the patients received en-bloc resection with 13 wide resection and 8 marginal resection. Thirteen patients underwent modular hemipelvic endoprosthesis reconstruction, and 5 patients underwent rod-screw system reconstruction combined with autograft. Two patients received hemipelvectomy and one type Ⅲ patients had resection without reconstruction. The mean follow-up period was 30. 3 months (range,6. 0-87. 0). Results Thirteen patients out of 21 survived after treatment The overall survival rate was 61. 9% , and 23. 8% patients were alive without disease. The estimated 5-year survival rate was 44. 2% based on Kaplan-Meier curve. The local recurrence rate was 28.6% , among which 4 cases were type Ⅱ resection, 1 was type I resection, 1 was type I + Ⅳ resection. No local relapse was found on the hemipelvectomy and type Ⅲ resection cases. The local recurrence rate after wide resection was 23. 1% ,and 37. 5% for marginal resection. Nine patients had lung metastases and one patient was found bone and lymph node metastases. The MSTS 93 function score was 20. 6±5. 4 for 13 patients,and 22. 5±2. 1 for rod-screw reconstruction cases. The function score was 17. 7±5. 5 for hemipelvic prosthetic reconstruction. Conclusion Limb salvage procedures could be performed on most pelvic osteosarcoma cases, and satisfying function outcome could be achieved with proper reconstruction,however,the overall survival is still lower compared with those in extremities.