WHO Ⅰ型脑膜瘤瘤旁脑水肿的MR表现与脑膜瘤病理类型的关系研究

Study of the relevance and relationship between the various MR findings of peritumoral brain edema caused by WHO Ⅰ meningioma and the different pathological types of meningiomas

[目的]探讨由WHOⅠ型脑膜瘤引起的不同类型瘤旁脑水肿(peritumoral brain edema,PBE)的MR表现与脑膜瘤病理类型的关系。[方法]脑凸面及镰旁WHOⅠ型脑膜瘤83例,均行MR和MR增强扫描,分析脑膜瘤病理类型与PBE的MR表现的关系。[结果]脑膜瘤的不同亚型PBE有不同的MR表现;脑膜瘤增强表现与PBE关系密切,无脑水肿与广泛脑水肿肿瘤亚型的极显著强化比例分别为66.35%与100.00%。本组不同亚型脑膜瘤的PBE易发次序为:分泌型、血管瘤型、微囊型、过渡型(混合型)、上皮型、砂粒体型和纤维型;易发广泛PBE的亚型依次为:分泌型、微囊型、血管瘤型、过渡型、上皮型。[结论]PBE的MR表现与脑膜瘤病理亚型关系密切。

[Objective] To explore the relationship between the MR manifestations of peritumoral brain edema（PBE） caused by WHO Ⅰ meningioma and their pathological types.[Methods] The study conducted a retrospective analysis of the clinical,pathological data of 83 cases of cerebral convexity and the falx WHO Ⅰ meningioma which all were undergone MR and enhancement scanning,and the relationship between the MR findings of PBE and the pathological types of meningiomas was analyzed.[Results] The study showed that different subtypes of meningiomas had different MR of PBE findings.Enhanced manifestations were closely related to the PBE,and the rates of very significant enhancement were 66.35% and 100.00% in the extensive PBE and without.The order prone to PBE meningioma as the following： secretory,hemangioma,microcystic,transitional（mixed）,epithelial,psammomatous and fibrous type;the order prone to extensive pathological subtypes of brain edema was as follows： secretory,microcystic,.hemangioma,transitional and epithelial type.[Conclusion] The possible conclusion of this study is that MR manifestations of PBE are indispensible with the pathological types of meningiomas.