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Fig. 3. —3-year-old boy with poor clinical outcome after encephaloduroarteriosynangiosis (EDAS).

A, Axial projected three-dimensional time-of-flight MR angiogram shows severe stenosis of right internal carotid artery (ICA) and near total occlusion of left ICA, consistent with moyamoya disease. Posterior cerebral artery is normal and moyamoya vessels (MMVs) are mild bilaterally. Right middle cerebral artery (MCA) vascular supply is fair, whereas left MCA vascular supply is poor.