新鲜深冻同种异体单髁移植重建股骨远端肿瘤切除后骨缺损12例

目的:验证股骨远端肿瘤切除同种异体单髁移植重建的可行性,并观察其初步结果.方法:对2003-07/2008-08在解放军总医院骨科行股骨远端肿瘤切除、新鲜深冻同种异体单髁重建修复骨缺损的12例患者进行回顾性分析.12例患者中,病变位于股骨内髁者5例,位于股骨外髁者7例.8例是骨巨细胞瘤,其中2例就诊时伴有病理骨折;3例骨肉瘤和1例低分化纤维肉瘤.移植前进行MRI和/或CT检查,明确肿瘤的范围确实小于半侧股骨髁.骨肉瘤和纤维肉瘤的患者接受移植前3个疗程和移植后6个疗程的抗肿瘤药物治疗;骨巨细胞瘤患者术中未进行辅助处理.移植后标本的边缘常规进行病理学检查;采用X射线片或CT进行随访;采用骨骼和肌肉肿瘤协会的评分系统对移植后功能进行评价.结果:所有患者均获得随访,移植后随访时间平均35个月,无患者死亡.在最近的随访时未发现肿瘤出现局部复发或者转移,未出现明显的免疫排斥反应或者感染,钢板也无松动或者断裂.所有患者的移植物均存位.3例患者出现软骨下骨塌陷和关节退变,但是功能良好;3例患者出现膝关节不稳.在30点满分的骨骼和肌肉肿瘤协会评分中平均为26点.结论:对于病变限于股骨单髁的骨巨细胞瘤和抗肿瘤药物治疗后具有清晰边界的恶性肿瘤患者,在充分切除肿瘤的基础上,进行同种异体单髁移植是一种较好的治疗方法.

Reconstruction with fresh deep freezing unicondylar osteoarticular allograft in 12 cases following resection of distal femur tumor

OBJECTIVE:To evaluate the feasibility and initial outcome of reconstructing the defect femur by unicondylar osteoarticular altograft after resection of distal femur tumor.METHODS:Between July 2003 and August 2008,a total of 12 patients with distal femur tumor treated by unicondylar resection and fresh-frozen unicondylar osteoarticular allograft reconstruction of bone defects were retrospectively reviewed at the Department of Orthopedics,General Hospital of Chinese PLA.Of 12 patients,5 medial and 7 lateral femoral condyles were involved.There are 8 patients suffering from giant cell tumor,including 2 patients complicating with pathologic fracture,3patients suffering from osteosamoma and 1 patient suffering from low-grade fibrosarcoma.Before transplantation,MRI and/or CT were used to determine that the tumor was definitely limited in half condyle.Three cycles of chemotherapy preoperatively and six cycles of chemotherapy postoperatively were conducted in patients suffering from osteosarcoma and fibrosarcoma.Patients with giant cell tumor did not receive any intraoperative adjuvant treatment.The surgical margin of resected tumors was evaluated by histological examination.All patients were followed by radiograph or CT.Postoperative function was evaluated by Musculoskeletal Tumor Society (MSTS) scoring system at the time of the latest follow-up.RESULTS:All patients were followed up.The patients were followed up mean 35 months after transplantation.None of the patient died.No local recurrences and metastases were found at the latest follow-up.No evident immune rejection and deep infection were seen.No plate loosening or breakage was observed.All patients had their grafts retained at the time of the latest follow-up.Three patient's allograft showed subchondral bone collapse and articular deterioration,but the function was good.Instability of the knee joint was noted in 3 patients.The mean MSTS functional score (totally 30 points) was 26 points.CONCLUSION:For some patients with giant cell tumor or malignant tumors with clearly defined margins after chemotherapy.When the lesions were limited in half condyle and enough surgical margins can be achieved,reconstruction of bone defect with unicondylar osteoarticular allografts after bone tumors were resected appears to be a reliable alternative.