Abstract
1. It was described of sequential changes of angiography in 8 cases with “Moyamoya” disease followed up over 3.5 years after ST·MC anastomosis. 2. One month after surgery, a few cortical branches of MCA were observed by external carotid angiography. Three months after surgery, whole cortical branches of MCA were visualized through both surgical anastomosis and spontaneous anastomosis of middle meningeal artery. 3. Concerning the changes of point of anastomosis, fine vascular network appeared about 6 months after surgery, and the anastomosis was getting to obstruct one year after surgery. Afterward, cortical branches of MCA were opacified through the fine vascular network produced at the region of anastomosis. 4. The basal moyamoya vessels decreased in volume and density about 3 months after surgery, and unchanged since one year after surgery.
