•There are different types; quite a few don't cause symptoms till a major occasion like pregnancy or trauma 37.Shin B S, Do Y S, Cho H S et al. Cardiovascular consequences and predictability of cardiovascular collapse after recurring intravenous bolus injections of complete ethanol in anesthetized pigs. This venous pouch https://sgvasculargrp.com/medical-condition/vascular-malformations/