Asymptomatic spinal cord involvement in posterior reversible encephalopathy syndrome.

Posterior reversible encephalopathy syndrome (PRES) is a reversible syndrome that presents with nausea and headache; altered consciousness; weakness; visual changes, including blurred vision or hemianopsia; seizures; and rarely coma. MRI demonstrates vasogenic edema, generally bilateral, predominant in the posterior parietal, temporal, and occipital regions of the brain. Commonly associated with severe acute hypertension, PRES is associated with eclampsia, renal failure, electrolyte disorders, hypocholesterolemia, drug abuse, infections, autoimmune diseases, and immunosuppressive and chemotherapy.