American Journal of Neuroradiology 2008;29:456.
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American Journal of Neuroradiology
DOI 10.3174/ajnr.A0926
BRAIN
Delayed CSF Enhancement in Posterior Reversible Encephalopathy Syndrome
From the Department of Diagnostic Radiology, Oregon Health & Science University, Portland, Ore.
Please address correspondence to Bronwyn E. Hamilton, MD, Mail Code CR 135 Department of Diagnostic Radiology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239; e-mail: hamiltob{at}ohsu.edu
SUMMARY: We present a case of increased fluid-attenuated inversion recovery signal intensity in the subarachnoid spaces on 6-hour delayed enhanced MR imaging in a patient with posterior reversible encephalopathy syndrome (PRES) in the setting of acute hypertensive encephalopathy. This hyperintensity was believed due to CSF gadolinium enhancement, a finding that would be anticipated in light of the suspected pathogenesis of increased microvascular permeability in PRES.