Image of the Month

Many patients with posterior reversible encephalopathy (PRES) present with a prodrome of nonspecific symptoms—headache, altered mentation, and visual disturbances. The importance of these nonspecific symptoms may not be recognized or clearly recorded in the patient's clinical history though. Approximately three-quarters of patients develop seizures, and this presentation, along with hypertension, is more frequently noted and triggers physicians to consider the diagnosis of PRES. To find out more about PRES and how imaging helps with the diagnosis, see Image of the Month, page 21.