FIG 4. Atypical cases of PRES.

A, Axial FLAIR MR image in a case of uremic encephalopathy (patient 18) shows marked frontal lobe involvement.

B and C, Axial FLAIR MR images (TR/TE/TI/NEX, 11,002/140/2,250/1; FOV, 20) in a case of hemolytic-uremic syndrome (patient 22) show involvement in the temporal lobes and thalami. Note also the striking involvement of the brain stem.