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目的：研究脑膜瘤ＣＴ、ＭＲ和手术误诊的原因及其合理应用。材料与方法：收集脑膜瘤及相关误诊疾病共２２例，分析ＣＴ、ＭＲ和手术误诊的主要原因，以及作出正确诊断的检查方法及其原因。结果：２２例误诊中，作ＣＴ２０例，误诊１７例；作ＭＲ７例，误诊５例；并用ＣＴ和ＭＲ５例，其中２例ＣＴ错误，ＭＲ正确；３例ＭＲ错误，ＣＴ正确。ＣＴ误诊原因有“等密度或较小病变未作增强”等７条。ＭＲ误诊原因有“不能确切识别肿瘤钙化”等４条。手术误诊主因受既往手术或细胞学结果的影响。结论：①为防止脑膜瘤误诊，ＣＴ平扫必须补加增强扫描。②ＣＴ和ＭＲ联合应用可取长补短，避免误诊。③手术可纠正大部分影像学误诊。
Objective: To study the causes of misdiagnosis of CT, MR and surgery of meningiomas and their rational application. MATERIALS AND METHODS: Totally 22 cases of meningiomas and related misdiagnosis diseases were collected. The main causes of misdiagnosis of CT, MR and surgery were analyzed, as well as the methods of diagnosis and their causes. Results: Of the 22 cases misdiagnosed, 20 were CT, 17 were misdiagnosed; 7 were MR; 5 were misdiagnosed; CT and MR were used in 5 cases. CT was wrong in 2 cases and MR was correct; MR was incorrect in 3 cases and CT was correct. CT misdiagnosis of “equal density or lesser lesions without enhancement” and other 7. MR misdiagnosis of the reasons “can not accurately identify the tumor calcification” and other four. The main cause of misdiagnosis of surgery by the previous surgery or cytology results. Conclusion: ①In order to prevent misdiagnosis of meningiomas, CT scan must be added. ② CT and MR combination can learn from each other to avoid misdiagnosis. ③ surgery can correct most of the misdiagnosis of imaging.