颅内孤立性纤维瘤的MRI征象  

MRI characteristics of intracranial solitary fibrous tumor

作　　者：崔静[1] 韩立新[1] 曹惠霞[1] 杜渭清[1] 张丽[1] 王俊[1] 陈耿[1] 

机构地区：[1]广州军区广州总医院磁共振室,广州510010

出　　处：《放射学实践》2016年第3期224-227,共4页Radiologic Practice

摘　　要：目的:探讨颅内孤立性纤维瘤(SFT)MRI特征,提高对该病的认识及术前诊断的准确性。方法:回顾性分析7例经手术和病理证实的颅内孤立性纤维瘤的MRI征象。结果:7例患者中,3例位于额部,1例位于颞部,2例位于枕部,1例位于顶部。肿瘤边界清楚,5例呈圆形或椭圆形,无囊变、坏死,瘤周水肿不明显;2例边缘呈分叶状,内见囊变、坏死,灶周水肿明显。7例病变均以宽基底与硬脑膜相连,1例见"脑膜尾征",2例内见流空血管征象。肿瘤实性成份T1WI为等信号,T2WI为等、低信号,囊变部分T1WI为低信号,T2WI为高信号。增强扫描所有病灶实质部分显著强化,T2WI低信号区明显强化,坏死囊变区未见强化。结论:MRI检查可较好地显示肿瘤的部位、形态及其与邻近组织的关系,有助于对颅内孤立性纤维瘤的诊断及鉴别诊断。Objective：The goal of this study was to explore the MRI characteristics of intracranial solitary fibrous tumor（SFT）in terms of improving the diagnostic accuracy before surgery.Methods：The MRI features of seven patients with intracranial SFT,confirmed by surgical and pathological results,were retrospectively analyze.Results：As for the total seven cases,three cases were located in the frontal lobe,one in the temporal,two in the occipital lobe,and one in the parietal lobe.Five lesions were oval-shapedwithoutobvious peritumoral edema and intratumoral necrosis or cystic degeneration.Two lesions were lobulated with significant peritumoral edema and intratumoral necrosis or cystic degeneration.All 7cases had a wide base with meminges and one showed ＂dural tail sign＂.Two cases had vascular void flow inside the tumors.The tumor parenchyma was isointensity on T1 WI,and isointensity or hypointensity on T2 WI.While the necrosis or cystic degeneration area was hypointensity on T1 WI and hyperintensity on T2 WI.The tumor parenchyma was intensively enhanced.The hypointensity area on T2 WI showed intensive enhancement,too.Conclusion：MRI can distinctly and precisely reveal the tumor＇s location,shape and the relation with surrounding tissue.It is helpful in the diagnosis and differentiation of intracranial solitary fibrous tumor.

关 键 词：孤立性纤维瘤 颅内 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.41[医药卫生—诊断学]