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This study was performed to explore the clinical efficacy of bone transport using external fixation for treatment of large bone defects after tibial tumor resection in five patients. Bone transport started 14 days postoperatively at 1 mm/day and was adjusted according to the callus-to-diameter ratio. The bone transport time, bone graft fusion, relapse, and metastasis were recorded. Clinical efficacy was evaluated using the Musculoskeletal Tumor Society (MSTS) scoring system. The tumors included osteosarcoma (n=2), Ewing sarcoma (n=1), malignant schwannoma (n=1), and hemangioma (n=1). The average bone defect length after resection was 11.6 cm. The five patients were followed up for an average of 50.8 months, and the average bone transport time was 15.5 months. Three patients who underwent postoperative chemotherapy were followed for 22.7 months, and two who did not undergo chemotherapy were followed for 4.75 months. Four patients underwent iliac bone grafting, and one underwent vascular pedicle fibular transplantation. The average MSTS score was 21.2 (19.3 for patients who underwent chemotherapy and 24.0 for patients who did not). No relapse or metastasis was observed. Bone transport is effective for reconstruction of large bone defects after tibial tumor resection as well as tibial malignancies with high doses of chemotherapy.

Bone transport for reconstruction of large bone defects after tibial tumor resection: a report of five cases