Cerebral arteriovenous malformations associated with moyamoya phenomenon.

Cerebral arteriovenous malformations (AVMs) are associated with a variety of alterations in the angioarchitecture of the feeding arteries and draining veins [1-3]. Between January 1985 and December 1988 we examined the angiograms of 97 patients with cerebral AVMs to assess their potential for endovascular treatment. Two patients showed occlusion of major vessels and an associated moyamoya phenomenon at the base of the brain . Vessel occlusion and moyamoya associated with A VMs are reviewed and hypotheses as to their development are discussed.