目的 探讨脑室内脑膜瘤影像学 表现，为提高该病诊断的准确性提供重 要参考依据。方法 回顾性分析2010年5 月-2014年2月我院收治的12例经手术病理 证实的脑室内脑膜瘤患者的临床资料，行 磁共振成像(MRI)检查，分析及总结其影 像学特征。结果 肿瘤均为单发，9例位于 侧脑室(4例右侧侧脑室三角区，3例左侧 侧脑室后角，2例左侧侧脑室三角区)，2 例三脑室，1例四脑室；病灶呈球形、不 规则或分叶状肿块，边界清晰；T1WI为等 信号(10例)，略低信号(2例)，T2WI等信 号(8例)，稍高信号(4例)，信号较均匀， 小片坏死(1例)；T1WI增强扫描信号呈均 匀或不均匀强化，DWI、Flair呈等低混杂 或稍高信号。结论 脑室内脑膜瘤的MRI影 像学表现有一定特征性，为临床准确诊断 提供重要参考依据。

Objective To investigate the imaging findings of intraventricular meningiomas, and provide an important reference for improving the accuracy of diagnosis of the disease. Methods The clinical data of 12 intraventricular meningiomas patients confirmed with surgically and pathologically who were treated in our hospital between May 2010 and February 2014 were analyzed retrospectively. Magnetic resonance imaging (MRI) was performed in all patients, and the imaging findings were analyzed and summarized. Results All tumors were solitary, 9 cases were located in the lateral ventricles (4 cases in the trigonum of rightlateral ventricles, 3 cases in occipital horn of leftlateral ventricle, 2 cases in the trigonum of left lateral ventricle), 2 case in the third ventricle and 1 case in the fourth ventricle; The lesions were spherical, irregular or lobulated masses, with clear boundaries. There was equal signal (10 cases) and slightly low signal (2 cases) on T1WI, equal signal (8 cases) and slightly high signal (4 cases) on T2WI, the signal was homogeneous, and there was small necrosis (1 case). T1WI enhanced scan signal was homogeneous or inhomogeneous enhancement. DWI and Flair showed equal low mixed or slightly high signal. Conclusion The MRI findings of intraventricular meningiomas are special, which provide an important reference for clinical diagnosis.