结论：硬膜骨化是OLF常见的表现。
硬膜骨化有2个影像学征象，即轨道征和逗点征。
There are 2 radiologic signs of dural ossification, namely, the tram track sign and the comma sign.
方法：回顾性地分析了本文作者所建立OF L数据库，检索出术中证据显示硬膜骨化和硬膜撕裂的OLF病例。
Methods. A retrospective analysis of a database of OLF maintained by this author was done to identify cases of OLF where there was intraoperative evidence of dural ossification and dural laceration.
方法：回顾性地分析了本文作者所建立OF L数据库，检索出术中证据显示硬膜骨化和硬膜撕裂的OLF病例。
Methods. A retrospective analysis of a database of OLF maintained by this author was done to identify cases of OLF where there was intraoperative evidence of dural ossification and dural laceration.
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