Aneurysm (IMAGE) Université de Genève Caption An aneurysm is a natural dome (in blue) that usually grows at an intracerebral arterial bifurcation aimed at decreasing the friction forces (in red) and thus allowing the vessel to heal. Multiple factors participate in the healing of the vessel wall; danger comes however from the risk of rupture. Credit © UNIGE-HUG Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.