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These are examples of the remodeling of intracranial atherosclerotic disease. A. A 70-year-old man with asymptomatic MCA stenosis shows the smaller outer boundary of the stenotic segment (arrow on right-side figure) than contralateral side (arrow on left-side figure). B. Symptomatic MCA stenosis in a 67-year-old man shows the positive remodeling (arrow on right-side figure) which has the larger diameter than contralateral normal MCA (arrow on left-side figure).
