195

FIGURE 195-1

FIGURE 195-2

FIGURE 195-4

FIGURE 195-3

FINDINGS Figure 195-1. Axial DWI through the upper pons. There are bilateral large almost symmetrical temporooccipital hyperintensities (stars). Left basis pontis, right tegmentum, and bilateral superior vermis/cerebellum demonstrate confluent hyperintensities. The ADC map (not shown) demonstrates corresponding hypointensities consistent with restricted diffusion and acute infarcts. Figure 195-2. Axial DWI through the midbrain. There are similar bilateral symmetrical temporo-occipital and confluent midbrain (star) hyperintensities consistent with acute infarcts. Figure 195-3. Axial DWI through the thalami. There are symmetrical bilateral thalamic (stars) and occipital acute infarcts. Figure 195-4. Normal CTA MIP of “top of the basilar” major branches in a normal companion case. Basilar summit (chevron), posterior cerebral artery (PCA) (vertical arrows), superior cerebellar artery (SCA), duplicated in this case (transverse arrows).

DIFFERENTIAL DIAGNOSIS N/A.

DIAGNOSIS Top of the basilar syndrome.

DISCUSSION

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