Yasargil classification of vein of Galen aneurysmal malformations
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