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Rapid and near-complete resolution of moyamoya vessels in a patient with moyamoya disease treated with superficial temporal artery-middle cerebral artery bypass.

Several groups have reported partial resolution of moyamoya vessels following surgical revascularization in pediatric patients, but angiographic documentation of near-complete resolution has been poor. We report here a case of a 5-year-old boy who underwent bilateral superficial temporal artery-middle cerebral artery bypass combined with unilateral encephaloduroarteriosynangiosis who demonstrated near-complete resolution of moyamoya vessels and a dramatic improvement in cerebral perfusion as measured by xenon-enhanced CT. The resolution of moyamoya networks may serve as an indicator of successful surgical revascularization.