Moyamoya disease

Moyamoya disease, also known as abnormal vascular network at the base of the brain, is a group of cerebrovascular diseases characterized by stenosis or occlusion of the intracranial internal carotid artery siphon and the proximal portions of the anterior and middle cerebral arteries, with the appearance of abnormal small vascular networks at the base of the brain. Because cerebral angiography reveals many densely clustered small vessel shadows resembling smoke blown out during smoking, it is named moyamoya disease. The disease was first described by Shimizu and Takeuchi of Japan in 1955 and named by Suzuki in 1966. It has been found in Chinese, Japanese, Caucasians, Blacks, and other populations. According to literature reports, it is more common in Chinese and Japanese people.