What is moyamoya disease?

Updated: Nov 09, 2018
  • Author: Roy Sucholeiki, MD; Chief Editor: Amy Kao, MD  more...
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Answer

Moyamoya disease is a progressive, occlusive disease of the cerebral vasculature with particular involvement of the circle of Willis and the arteries that feed it. [1] The image below is a schematic representation of the circle of Willis, the arteries of the brain, and the brainstem. (See Etiology.)

Schematic representation of the circle of Willis, Schematic representation of the circle of Willis, arteries of the brain, and brain stem.

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