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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.