中老年脑多形性黄色瘤型星形细胞瘤的MR分析
Chinese Computed Medical Imaging(2016)
Abstract
目的:分析中老年脑多形性黄色瘤型星形细胞瘤(PXA)的MRI表现.方法:回顾性分析12例经手术病理证实的中老年PXA的MR资料,所有患者均行MR平扫加增强检查.结果:12例均单发且位于脑表浅部位,11例位于幕上,1例位于幕下.10例囊实性,1例囊性,1例实性.囊壁和肿瘤实性部分T1呈等或稍低信号,T2呈等或稍高信号,增强后8例实性部分明显强化,4例呈斑点、片状不均匀轻到中度强化.4例壁无或轻度强化,8例囊壁部分或全部明显强化.5例无瘤周水肿,7例轻度瘤周水肿.2例囊实性病例术后复发且发生间变.结论:发生于中老年人的脑多形性黄色瘤型星形细胞瘤的MR特征类似于年轻人群的,术前MRI平扫及增强可以做出明确诊断.
MoreKey words
Middle-aged,Pleomorphic xanthoastrocytoma,MRI
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