肥胖细胞型星形细胞瘤的MRI表现:8例病例分析

发布时间：2018-11-08 07:04

【摘要】：目的探讨肥胖细胞型星形细胞瘤(Gem A)的MRI特点及鉴别诊断。方法回顾性分析经病理证实的8例Gem A的临床资料和MRI表现,8例均行MRI平扫及增强扫描,其中1例加扫磁敏感加权成像(SWI)序列,分析其影像特征。结果 8例Gem A全部位于幕上,均为单发,其中累及额叶7例,颞叶1例;4例累及多个脑叶,并通过胼胝体侵犯对侧脑组织;6例边界不清,2例边界清晰;肿瘤囊变4例;1例表现为大囊结节型,实性结节位于肿瘤脑膜面。肿瘤的实性成分在T1WI呈等或稍低信号,在T2WI呈稍高或高信号,在扩散加权成像(DWI)上呈稍高或高信号,ADC图呈等或低信号;增强后肿瘤实性成分多呈明显不均匀强化。结论 Gem A的MRI表现有一定特异性,单发,好发于额叶,边界不清,可囊变,可累及胼胝体侵犯对侧额叶,增强扫描后肿块实性成分明显强化。
[Abstract]:Objective to investigate the MRI features and differential diagnosis of obese astrocytoma with (Gem A). Methods the clinical data and MRI findings of 8 cases of Gem A confirmed by pathology were retrospectively analyzed. All 8 cases underwent MRI plain scan and enhanced scan, and one case underwent (SWI) sequence with magnetic sensitivity weighted imaging, and its imaging features were analyzed. Results all of the 8 cases of Gem A were located on the supratentorial, all of them were single, including 7 cases of frontal lobe, 1 case of temporal lobe, 4 cases of multiple lobes and invasion of contralateral brain through corpus callosum, 6 cases with unclear boundary, 2 cases with clear boundary, 4 cases with tumor cyst. One case showed a large cystic nodule with solid nodules located on the meningeal surface of the tumor. The solid components of tumor showed equal or slightly low signal intensity in T1WI, slightly high or high signal in T2WI, slightly high or high signal on diffusion-weighted (DWI), and iso-or low-signal on ADC. Conclusion the MRI features of Gem A are specific, single, predilection in frontal lobe, unclear boundary, cystic change, involvement of corpus callosum in contralateral frontal lobe, and enhancement of solid components of mass after enhanced scanning.
【作者单位】：南京军区总医院医学影像科;南京军区总医院医学病理科;
【基金】：南京军区总医院院内资助项目(编号:2013054)
【分类号】：R739.4;R445.2

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