FINDINGS Figure 86-1. Axial NCCT through the occipital lobes. There is a large left occipital hypodensity (arrows) abutting the tentorium medially. Figure 86-2. Axial DWI through the occipital lobes. There is a large hyperintensity (low ADC not shown) consistent with area of restricted diffusion in the left occipital lobe. Figure 86-3. Axial T2WI through the occipital lobes. There is a large left occipital lobe hyperintensity extending into the posteromedial left temporal lobe (arrows). Figure 86-4. 3D TOF MRA. There is a loss of signal in the left posterior cerebral artery (PCA) at the P2–P3 junction (vertical arrow). Distally the left PCA is severely attenuated (transverse arrow).
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