血管瘤型脑膜瘤MRI表现及病理学基础

摘要

Objective The MRI features and pathological basis of angiomatous meningioma were studied.Methods A total of 25 cases of patients with angiomatous meningioma confirmed by operation and pathology were retrospectively analyzed,including the MRI examination data and the pathological data.Results There were 15 cases locating around the cerebral falx,3 cases in the cerebellopontine angle area,5 cases around the tentorium cerebelli and 2 cases in sellar region.MRIshowed a clear boundary of soft tissue masses.Intracranial lesions showed slightly low signal intensity on T1WI and high signal intensity on T2WI.The space-occupying effect was obvious,but the tumor edema was light.Multiple abnormal flowing void phenomenon was visible in intratumor tissues.MRI enhancement scanning showed the solid tumors were significantly enhanced.Conclusion The incidence of angiomatous meningioma is very low,but MR performance has a certain characteristics,so MRI can facilitate the positioning and qualitative diagnosis of the disease.%目的 探讨血管瘤型脑膜瘤的MRI特征及病理学特点.方法回顾分析25例经手术和病理证实的血管瘤型脑膜瘤的影像资料,对其MRI特点及病理基础进行分析.结果 肿瘤位于大脑镰旁15例,桥小脑角区3例,小脑幕旁5例,鞍结节2例,影像表现为边界清楚的实性软组织肿块;大部分病变T1WI呈稍低信号,T2WI呈高信号,瘤内可见流空血管,占位效应明显而水肿轻;肿瘤内部信号均匀;增强扫描实性肿瘤均非常显著强化.结论 血管瘤型脑膜瘤发病率较低,但其MR表现具有一定的特征性,MRI检查有利于肿瘤术前定位及定性诊断.