Revascularization surgery for 28 patients with moyamoya disease--operative methods, outcome and postoperative angiography.

51 times (sides) of reconstructive surgery using 28 patients with moyamoya diseases were evaluated concerning operative methods, outcome and postoperative angiographic findings. Twenty patients (72%) showed excellent results, 7 patients (25%) good and 1 patient (3%) poor. Development of collaterals shown on postoperative angiograms was excellent on 20 sides, good on 9 sides, and fair on 8. Abundant neovascularization was most commonly noted on angiogram in superficial temporal artery-middle cerebral artery bypass with encephalo-myo-synangiosis. Encephalo-myo-arterio-synangiosis, devised by the authors, or encephalo-myo-synangiosis alone also produced preferable development of collaterals shown on angiogram. Superficial temporal artery-middle cerebral artery bypass alone was insufficient for development of neovascularization.