In many situations, the moment a vascular tumor like a hemangioma shrinks, it will not likely regrow — the regression is long term. Even so, approximately 30 p.c of hemangiomas will not entirely shrink. Aneurysm. This is the balloon-like bulge in the partitions of any on the blood vessels feeding https://sgvasculargrp.com/medical-condition/vascular-malformations/