LARGE DIFFUSE ARTERIOVENOUS MALFORMATION AFFECTING THE RIGHT CEREBRALAND CEREBELLAR HEMISPHERES - CASE-REPORT

A cerebral vascular malformation was triggered in a 24-year-old man by left hemiparesis resembling transient ischemic attack. Cerebral angio graphy revealed slight dilation of the right anterior cerebral artery, middle cerebral artery, superior cerebellar artery, and posterior inf erior cerebellar artery, as well as marked capillary blush and dilatio n of medullary veins involving the right cerebral hemisphere, especial ly the frontal lobe and cerebellar hemispheres. This vascular malforma tion, a clinical rarity, seemed to be in the same family as diffuse ar teriovenous malformation or ''medullary venous malformation,'' Single photon emission computed tomography showed a decline in cerebral blood flow in the right cerebral hemisphere, which was the probable cause o f the left hemiparesis.