Unusual reasons and imaging finding in (PRES) posterior reversible encephalopathy syndromes

Posterior reversible encephalopathy syndrome (PRES) is a rare clinico-radiological entity characterized by rapid onset of symptoms including headache, seizures, altered consciousness, and visual disturbance. Associated with white matter changes predominantly affecting the posterior parietal and occipital lobes of the brain on neuro imaging. Several conditions have been associated with PRES. The well documented are hypertension; eclampsia, immunosuppressive and cytotoxic treatments, autoimmune diseases and infections/sepsis. There are as well numerous associations rarely or anecdotally reported. It is particularly important not to exclude PRES as a possible diagnosis when we have the appropriate clinical presentation accompanied by the typical radiological findings. It is an increasingly recognized disorder, with a wide clinical spectrum of both symptoms and triggers, and yet it remains poorly understood. We report unusual reasons of PRES and findings.