脑室内脑膜瘤的MRI诊断
Chinese Journal of Medical Imaging（2012）
Abstract
目的 探讨脑室内脑膜瘤MRI特征及病理学表现,以提高对该病的诊断准确性.方法 回顾性分析经手术病理证实的18例脑室内脑膜瘤影像学表现.所有病例均行MR平扫加增强扫描.结果 18例中,16例位于侧脑室,2例位于三脑室.脑室内脑膜瘤多表现为圆形、类圆形(11例)或分叶状(7例)肿块.T1WI上呈稍低信号(14例)或低信号(4例);T2WI呈稍高信号(12例)或低信号(6例),9例见不同程度的瘤周水肿.增强扫描多明显均匀强化,5例可见少许斑片状低信号.14例见肿瘤与邻近脉络丛关系密切.结论 脑室内的脑膜瘤的MRI表现具有一定的特征性,结合临床资料可提高其诊断准确性.
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Key words
cerebral ventricle,magnetic resonance imaging,memningioma
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