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14-year-old child with acute stroke in bilateral middle cerebral artery (MCA) watershed regions. Stroke is bright on DWI (top panel) and dark on ADC (center panel). MRA (bottom panel) shows severe cerebral vasculopathy with occlusion of the right MCA (arrow) and absence of the anterior cerebral arteries bilaterally. The majority of the intracranial blood flow is provided by the posterior cerebral arteries and the posterior division of the left MCA
