Balloon occlusion to lower outflow and further more embolization with ethanol from microcatheter inserted in the balloon catheter. ( A rotating wire damages the vein’s innermost layer even though sclerosant seals it off. It’s a painless process with much less local anesthetic injections and no threat of warmth-associated nerve damage. https://www.sgvascularctr.com/understanding-venous-malformation-treatments-in-singapore/