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Figure 1: Initial brain magnetic resonance image revealed tiny acute infarction in the right cerebellum on the day of admission (arrow) (a) and severe stenoocclusion throughout the whole vertebrobasilar artery system (white arrowhead) (b). Follow-up diffusion-weighted images (DWI) on the hospital day 5 showed extension of preexisting acute infarction in the right cerebellum (c) and additional new acute infarctions in both cerebellar hemispheres and pons (d). Follow-up magnetic resonance angiography at 1 year after admission demonstrated much-improved patency of vertebrobasilar vasculature (e)

Figure 1: Initial brain magnetic resonance image revealed tiny acute infarction in the right cerebellum on the day of admission (arrow) (a) and severe stenoocclusion throughout the whole vertebrobasilar artery system (white arrowhead) (b). Follow-up diffusion-weighted images (DWI) on the hospital day 5 showed extension of preexisting acute infarction in the right cerebellum (c) and additional new acute infarctions in both cerebellar hemispheres and pons (d). Follow-up magnetic resonance angiography at 1 year after admission demonstrated much-improved patency of vertebrobasilar vasculature (e)