Posterior reversible encephalopathy syndrome
the hypertensive patient presented with a headache.
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Relatively symmetrical and bilateral abnormal signal intensity is seen in both frontal and parietal regions. It shows hypointense signal on T1 and hyperintense signal on T2 and FLAIR images.
The lesion does not exert a mass effect, The findings in favor of posterior reversible encephalopathy syndrome (PRES) (acute hypertensive encephalopathy).
Posterior reversible encephalopathy syndrome (PRES) is a neurotoxic state that occurs secondary to the inability of the posterior circulation to autoregulate in response to acute changes in blood pressure.