Yasargil classification of vein of Galen aneurysmal malformations
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The Yasargil classification is one of the two common systems for classifying vein of Galen malformations that is currently in use at the time of writing (mid 2016).
- type I: small pure cisternal fistula between the vein of Galen (voG) and either the pericallosal arteries (anterior or posterior) or posterior cerebral artery
- type II: multiple fistulous communications between the vein of Galen and the thalamoperforating vessels
- type III: high flow mixed type I and II
- type IV: parenchymal arteriovenous malformation (AVM) with drainage into the vein of Galen