论文部分内容阅读
目的:探讨囊性脑膜瘤的CT和MRI表现及相关临床特征,提高特殊类型脑膜瘤的认识水平。方法:回顾性分析21例分析经手术和病理证实的囊性脑膜瘤的影像学和相关临床资料。结果:囊性脑膜瘤主要发生于大脑凸面和大脑镰旁,多为实质肿块和囊腔并存,囊腔大小不等。肿瘤实质CT平扫呈等或稍高密度;T1WI为等或稍低信号,T2WI呈等或稍高信号,增强扫描均匀强化。囊壁强化多见于NautaⅢ型,“硬脑膜尾”征多见于NautaⅠ型和Ⅱ型。结论:CT和MRI能明确肿瘤实质部分和囊腔的相对位置关系有利于囊性脑膜瘤诊断并区分NautaⅡ型和Ⅲ型,囊液的MRI信号特征在一定程度上能反映其形成机制,增强MRI可对手术切除范围提供关键信息。
Objective: To investigate the CT and MRI findings of cystic meningioma and its clinical features, and to improve the level of awareness of specific types of meningioma. Methods: A retrospective analysis of 21 cases of cystic meningioma confirmed by surgery and pathology imaging and related clinical data. Results: Cystic meningioma occurred mainly in the convex cerebrum and falx next to the brain, mostly solid mass and cyst coexistence, cyst size. The tumor CT scan was equal or slightly higher density; T1WI is equal or slightly lower signal, T2WI was equal or slightly higher signal, enhanced scanning even enhanced. Wall enhancement more common in Nauta Ⅲ type, “dural tail” sign more common in Nauta Ⅰ and Ⅱ type. Conclusion: CT and MRI can determine the relative position between the tumor and the cyst, which is in favor of the diagnosis of cystic meningioma and distinguish Nauta Ⅱ and Ⅲ. The signal characteristics of cystic fluid MRI can reflect its formation mechanism to some degree, Can provide key information on the extent of resection.