Osteochondroma is a rare primary benign bone tumor that can occur in the sacrum.

骨软骨瘤是一种原发良性骨肿瘤，很少发生在骶骨。

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Objective: to study therapeutic effects of recombination heterologous bone grafting for repairing of postoperative bone defects of benign bone tumor.

目的：观察一种复合异种骨修复良性骨肿瘤手术切除后骨缺损的临床疗效。

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Conclusion: MRI, as an auxiliary method, is effective in the diagnosis of benign tumors and tumor-like lesions of bone.

结论：磁共振是骨良性肿瘤与肿瘤样病变的有效辅助诊断方法。

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Kaplan -- who also is not involved in Ware's care -- said it's also possible Ware had a benign bone tumor that weakened the tibia before his fall.

CNN: Kevin Ware could be playing again in less than a year