Imaging findings and diagnosis of atypical sites posterior reversible encephalopathy syndrome
CHEN Lei
CHEN Wen-jie
HUANG Qing-hai
TONG Yi-hui
CHEN Qing-shui
L(U) Chao-wei
Abstract：Objective To explore the magnetic resonance imaging(MRI) features of the posterior reversible encephalopathy syndrome (PRES) at atypical sites outside of the rear of cerebral hemispheres,in order to improve the accuracy of diagnosis and to explore its pathogenesis.Methods A retrospective analysis was made on the MRI image data of nine PRES cases in the atypical sites,including the conventional T1 WI,T2WI,fluid-attenuated inversion recovery(FLAIR) and diffusion weighted imaging (DWI).Five cases had MRA examinations; four cases had MRV examinations and three cases had MRI enhancement scanning.The MRI of all patients was re-examined within 3-14 days.Results Among nine cases of PRES,three cases mainly had the frontal lobe ; two cases had the temporal lobe; two cases had both sides of the cerebellar hemispheres ; one case had both sides of the basal ganglia; one case had pure pontine lesions ; one case had unilateral lesions of left frontotemporal lobe ; five cases underwent MRA examination,among them one case showed segmental stenosis of the left internal carotid artery and four MRA were normal;four MRV were normal.Among three cases of MRI enhancement,there was no abnormal enhancement.All lesions significantly improved or completely disappeared within 3-14 days.Conclusions Observing the MRI findings of PRES at atypical sites is helpful to correctly recognize PRES and the pathogenesis.
Keywords：Posterior reversible encephalopathy syndromeMagnetic resonance imagingPathogenesis
Publication Date：2013-12-30
Online Publishing Date：2026-09-14(First online date of this platform, not the publication date of the document)
Pages：3( 1716-1718 )