Fig 6.

A 20-year-old woman with a high-risk pregnancy who at 32 weeks of gestation became preeclamptic. At 33 weeks of gestation, she experienced a significant headache, blurred vision, and mild hypertension (156/106 mm Hg) with fetal distress and ultimately had a generalized seizure at delivery.

A–C, MR imaging demonstrates patchy vasogenic edema in the parietal region (curved arrows) bilaterally along with linear involvement along the superior frontal sulcus on the left (arrows) consistent with the findings in eclampsia. Involvement in the occipital lobe was not present, and the temporal lobes and cerebellum were normal bilaterally. Absence of occipital lobe involvement placed this in the partial and asymmetric expression group consistent with partial expression of the PRES pattern.