Sunday, December 27, 2009

Posterior reversible encephalopathy syndrome (PRES)





Characteristic imaging pattern in PRES is the presence of edema involving the white matter of the posterior portions of both cerebral hemispheres, especially the parieto-occipital regions, in a relatively symmetric pattern that spares the calcarine and paramedian parts of the occipital lobes. Recently, studies with diffusion-weighted sequenceshave shown increased apparent diffusion coefficients (ADCs) in the involved regions which suggests reversible vasogenic edema as an underlying pathophysiology. This is a 7 year old girl with classical MRI findings

Reported by Teleradiology Providers

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