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Fig 3. The patient is a 56-year-old woman with a thigh abscess (Klebsiella and Enterococcus species), baseline blood pressure of 156/68 mm Hg, and multiple organ failure (coagulopathy, acute respiratory distress syndrome, hepatic dysfunction with shock liver, and renal failure). She developed altered mentation and a seizure with toxicity blood pressure 164/75 mm Hg. A, Axial MR image (fluid-attenuated inversion recovery sequence) demonstrates extensive PRES vasogenic edema in the parietal region bilaterally (curved arrows). B, rCBV color map demonstrates severe flow reduction in the parietal region bilaterally (curved arrows), consistent with the regions of PRES imaging abnormality. PRES cortex rCBV relative to the reference cortex is 31% in the right parietal and 33% in the left parietal region.
