290

FIGURE 290-1

FIGURE 290-2

FIGURE 290-3

FIGURE 290-4

FIGURE 290-5

FINDINGS Figures 290-1 and 290-2. Axial DWI through the levels of the lateral ventricles and the vertex, respectively. Multifocal bilateral areas of restricted diffusion in multiple vascular territories, bilateral posterior cerebral artery (PCA) (figure 1 arrows), right anterior cerebral artery (ACA) (figure 290-2 transverse arrows), and left watershed region (figure 290-2 vertical arrow). Figure 290-3. Axial DWI follow-up through the vertex. There is progression of bilateral cerebral areas of restricted diffusion (arrows). Similar progression of T2 hyperintensities was present on FLAIR/T2WI (not shown) in bilateral ACA and PCA territories. Figure 290-4. Right parasagittal non-contrast T1WI on follow-up. There is gyriform hyperintensity in the right frontoparietal lobes (arrows) consistent with hemorrhagic infarcts. Figure 290-5. Axial post-contrast T1WI through the level of the centrum semiovale. There is bilateral leptomeningeal enhancement (arrows) superimposed on the underlying gyriform hyperintensity of subacute hemorrhage in bilateral frontoparietal lobes.

DIFFERENTIAL DIAGNOSIS

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