Posterior reversible encephalopathy syndrome: 'a headache' on the AMU.

: Headache and seizures are common presentations to the acute medical unit. We report a case of posterior reversible encephalopathy syndrome (PRES) in a 73-yr-old woman with a history of uncontrolled hypertension who had recently discontinued one of her antihypertensive drugs; such cases are rare but pose a diagnostic challenge given the nonspecific nature of the clinical presentation. However, early diagnosis and treatment leads to full recovery in the majority of patients.