PRES
Pronunciation: PRESS
Also written as: PRES — Posterior Reversible Encephalopathy Syndrome
Posterior reversible encephalopathy syndrome characterized by vasogenic edema in watershed territories.
Full Definition
Posterior reversible encephalopathy syndrome (PRES) is a clinical and radiological syndrome characterized by headache, altered mental status, seizures, and visual disturbances. Imaging typically shows bilateral symmetric areas of vasogenic edema predominantly affecting the posterior circulation territories, particularly the parietal and occipital regions. The condition is often associated with acute hypertension, eclampsia, immunosuppressive medications, or renal disease. Despite its name, the changes can affect anterior brain regions and may not always be completely reversible.
Usage
Usage note: Always correlate with clinical history of hypertension or immunosuppression.
In Context
- "The bilateral parieto-occipital T2 hyperintensity pattern was consistent with PRES." — Emergency MRI report
- "PRES was suspected given the patient's history of recent immunosuppression and acute hypertension." — Clinical correlation note