Balloon occlusion to lower outflow and further more embolization with ethanol from microcatheter inserted with the balloon catheter. ( Over time, cerebral vascular malformations are actually classified in many different ways by numerous authors, often on the basis on the existence or absence of arteriovenous shunting, histopathological functions or demographics https://www.sgvascularctr.com/understanding-venous-malformation-treatments-in-singapore/