脑发育性静脉异常的MR诊断

MR diagnosis of developmental venous anomalies

目的:分析、总结脑发育性静脉异常(DVAs)的MR典型表现,探讨其静脉解剖基础。方法:回顾分析了14例脑发育性静脉异常的MR平扫及增强扫描图像,总结其典型MR表现,记录DVAs的部位、引流方向,并分析其静脉解剖。结果:14例共发现15个DVAs及16个引流静脉。5例位于皮层下,9例位于脑室旁或深部。位于额部3例,顶部4例,小脑半球7例。其中4个DVAs为深部引流,1个DVAs同时有深部及表浅引流,其余9个为表浅引流。结论:DVAs的头部和引流静脉有其典型的发生部位及MR表现,最常见于脑室旁和皮层下区域,可由T2WI像发现病变,初步做出诊断,并由增强T1WI像得到证实。

Objective： To analyze and present characteristic MR findings of developmental venous anomalies （DVAs）, and investigate the venous anatomy. Methods： We reviewed the routine and contrast-enhanced MR examinations of 14 patients with DVA. The characteristic MR findings and site of the DVA and direction of draining veins were recorded. Resuits： Fifteen DVAs with 16 draining veins were located. 5 cases were subcortical, 9 were periventricular or deep. Three case was frontal, 4 were parietal and 7 were in the cerebellar hemisphere. The draining veins were deep in 4 DVA and superficial in 9, and 1 DVAs had both deep and superficial draining veins. Conclusion： The caputs and draining veins of DVAs occurred in typical locations, with the periventricular and subcortical regions being the most common locations T2-weighted MR images could find the DVAs first, but diagnosis could be made from contrast-enhanced T1-weighted MR images.