脑膜瘤MRI诊断和鉴别诊断  

MRI diagnosis and differential diagnosis of meningioma

作　　者：何光武[1] 文洁[1] 李满洋[1] 

机构地区：[1]上海市第一人民医院宝山分院放射科,上海200940

出　　处：《现代医药卫生》2010年第7期983-985,共3页Journal of Modern Medicine & Health

摘　　要：目的:分析脑膜瘤的发病部位和信号特点,探讨MRI对脑膜瘤的诊断价值。方法:收集36例经证实的脑膜瘤病例,均行MRI平扫+增强检查。结果:36例肿瘤中额顶部9例、顶枕部4例、前颅底6例、蝶骨嵴3例、上矢状窦旁2例、鞍区2例、侧脑室2例、小脑幕2例、大脑镰旁6例。30例呈圆形或椭圆形,6例半月形。脑膜瘤的MRI信号特点:脑膜瘤在T1WI呈等或稍低信号,30例呈等信号,6例为低信号,其中23例信号不均匀,可见小片状或囊样低信号影。26例在病灶周围可见环形低信号影。T2WI像上31例均呈稍高信号,信号不均匀者可杂有低信号的血管流空影和囊状的高信号影。增强后30例病灶均明显强化,但有23例强化不均匀,29例可见明显脑膜尾征。结论:MRI对脑膜瘤的诊断和鉴别诊断具有很大的诊断价值。Objective：To investigate the value of MRI in the diagnosis of meningioma by analyzing its location and MRI appearances.Methods ：Thirty-six cases of meningioma, proven surgically and pathologyically,were analyzed retrospectively.The age of 4 men and 32 women ranged 25 - 68 years（mean 49 years）.Thirty-six patients underwent MRI examinations with and without intravenous injection of contrast media.Results：The location of all 36 cases was：9 meningioma tumors located in frontal - parietal region,4 in parietal - occipital region,6 in anterior cranial fossa, 3 in crista sphenoidalis, 2 in para-superior longitudinal sinus, 2 in saddle area,2 in lateral ventricles,2 in tentorium of cerebellum,6 in para-cerebral falx. The shape of 30 eases was round and ellipse,6 was half-moon.The tumors appeared isointense or slightly hypointense on T1WI of 30,slightly hypointense on T1WI of 6,and slightly hyperintense on T2WI of 31.on post-contrast scans, MRI image showed significant enhancement of 30 eases.Conclusion：MRI is of great value in the diagnosis and differential diagnosis of meningioma.

关 键 词：脑膜瘤 磁共振成像 

分 类 号：R445[医药卫生—影像医学与核医学]