摘要:目的 探讨MRI对脑干海绵状血管瘤的诊断价值及影像学表现.方法 经临床和MRI检查确诊的脑干海绵状血管瘤30例,所有患者均行T1WI、T2WI及SWI序列扫描,25例行MRI增强扫描.结果 颅脑海绵状血管瘤(CCH)发生于中脑10例,桥脑13例,延髓7例.临床发作方式分为突然发作和静止发作2种类型.MRI表现:T1WI为等或低信号,占75.5%,T2WI为等或高信号,占84.5%;T1WI、T2WI呈混杂高信号,占36.8%;T2WI瘤周有低信号环,占17%,SWI呈现完全低信号、“铁环征”、“爆米花征”及“蝌蚪征”.25例行Gd-DTPA扫描,显示轻度强化或不强化.结论 MRI对脑干海绵状血管瘤的诊断具有重要价值,SWI、GRET2*序列的特征性表现有助于提高诊断的准确性.
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