Post-contrast FLAIR imaging in a patient with posterior reversible encephalopathy syndrome (PRES).

We herein present a case of delayed enhancement of CSF on fluidattenuated inversion recovery (FLAIR) imaging in a patient with posterior reversible encephalopathy syndrome (PRES). In our case despite the settled clinical setting of PRES initial MR scan was negative and on repeated FLAIR imaging increased CSF signal intensity was more conspicuous than subtle cortical involvement.