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骨肉瘤是一种常见的恶性骨癌，占原发性骨恶性肿瘤的35%。
Osteosarcoma is the most common type of malignant bone cancer, accounting for 35% of primary bone malignancies.
目的：评价肱骨内锁髓内钉复合异体骨段（关节）移植重建肱骨恶性肿瘤所致的大段骨缺损的临床效果。
Objective: To evaluate the effect of allografting with interlocked intramedullary nailing on humeral massive bone defect reconstruction.
相反原发性上颌骨恶性肿瘤则呈浸润性生长，骨质不规则破坏，大量瘤骨或瘤软骨形成、骨膜反应和软组织肿块等。
On the contrary, primary malignant maxillary tumor showed invasive growth, irregular bony destruction with massive bony or chondral tumor, periosteal reaction and soft tissue mass.
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