妊娠高血压综合征致脑后部可逆性脑病综合征的MRI表现  

MRI imaging features of posterior reversible encephalopathy syndrome caused by pregnancy-induced hypertension

作　　者：吕敦召 杨志宏[1] 钟美华[1] 黎旭英 张佳[1] 

机构地区：[1]九江市第一人民医院MRI室,江西332000

出　　处：《放射学实践》2012年第12期1308-1310,共3页Radiologic Practice

摘　　要：目的:探讨妊娠高血压综合征(PIH)致脑后部可逆性脑病综合征(PRES)的MRI表现。方法:回顾性分析9例临床诊断为PIH致PRES患者的MRI平扫及扩散加权扫描(DWI)表现。结果:9例PRES患者MRI均可见双侧顶枕区皮质及皮层下白质多发病灶,在T1WI上病灶呈等信号或略低信号,FLAIR及T2WI上呈高信号,6例DWI显示病灶呈等信号或低信号,扩散系数(ADC值)升高,3例病灶DWI上呈高信号,ADC值不变。治疗后随访MRI显示所有患者病灶逐渐减小、消失。结论:PIH妊娠晚期发生的PRES病好发于顶枕叶皮质及皮层下白质,治疗及时可逆转,采用MRI平扫及DWI成像结合临床特征,可做出较为明确诊断。Objective：To study the magnetic resonance imaging （MRI） features of posterior reversible encephalopathy syndrome （PRES） caused by pregnancy-induced hypertension （PIH）. Methods： 9 cases diagnosed as posterior reversible en- cephalopathy were examined by MRI scan and MRI scan＋ diffusion-weighted imaging （DWI）. Results：The MRI images of 9 cases displayed bilaterally symmetrical distributions with iso-intensity or slightly lowqntensity on T1 WI and increased signal intensity on T2 WI and FLAIR, some of the lesions with iso-intensity or slightly low-intensity on DWI and with high signals on ADC,also some lesions showed high signals on DWI and iso-intensity on ADC. MRI for follow-up showed complete or nearly complete absorption of lesions after adequate clinical treatment. Conclusion： Posterior reversible encephalopathy syn- drome caused by pregnancy-induced hypertension is mostly located in the parieto-oceipital cortex and the infracortical white matter. By integrating MRI scan and MRI scan＋ diffusion-weighted imaging with clinical characteristics, a clear diagnosis can be made,thus the posterior reversible encephalopathy syndrome caused by pregnancy-induced hypertension can be trea- ted with good results.

关 键 词：妊娠高血压综合征 脑疾病 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R742[医药卫生—诊断学]