摘要
目的分析眼眶孤立性纤维性肿瘤(SFT)的CT及MRI影像学特征,以提高诊断水平。方法结合文献回顾性分析经手术病理证实、行CT或MRI检查的眼眶SFT 4例,其中2例行CT平扫,3例行MR平扫及增强检查,分析其发生部位、大小、形态、边缘、密度、信号、增强特点。结果 4例病变均表现为边界清楚的类圆形软组织肿块,直径8~62 mm。2例位于肌锥外,2例位于眼球后肌锥内。2例CT上表现为较均匀的等高密度影,3例MRI检查T1WI表现为均匀的等低信号,3例T_2WI为等低信号,其中1例肿瘤内可见高信号区。增强检查3例明显强化,1例T2WI高信号区,强化也较肿瘤的其他部分更加明显,病理上对应肿瘤中富含血管的区域。结论中年患者,眼眶内孤立的类圆形肿块,边界清楚,T_2WI上呈等低信号,增强扫描明显强化,动态曲线为快进流出型,要考虑SFT的可能。在T_2WI上高信号的区域表现为更加明显的强化,也是眼眶SFT的特点之一。
Objective The purpose of this study was to describe the CT and MR imaging features of Solitary fibrous tumor（ SFT） in the orbit. Methods We retrospectively reviewed CT and MR images in 4 patients,with SFT located in the orbit,proved on histologic examination. 2/4 patients underwent CT,and MR imaging was obtained in 3/4. We evaluated the imaging findings with emphasis on the location,size,shape,margin,density,MRI signal and enhancement characteristics. Results 4/4 SFTs appeared solitary ovoid in configuration and had well-defined margins. The mean maximum diameter was 30mm（ range,8-62 mm）. The 2/4 tumors were located in the extraconal space,and the 2/4 tumors in the intraconal space. CT scan showed that 2/2 lesions had homogeneous isodensity or slightly high density. 3/3 SFTs appeared homogeneously isointense to gray matter on T_1-weighted images. On T_2-weighted images,the 3/3 lesions showed isointensity or hypointensity,1/3 lesion was heterogeneous,the small areas of high signal on T_2-weighted imaging corresponded to a region of more marked enhancement. The 3/3 lesions showed marked enhancement on contrast-enhanced MRI. Conclusion
出处
《临床放射学杂志》
CSCD
北大核心
2017年第9期1364-1367,共4页
Journal of Clinical Radiology
