Aortic dissection and aortic aneurysm

Illustration showing an aortic dissection and aortic aneurysm

An aortic aneurysm occurs when a weak spot in the wall of your aorta begins to bulge (left). This can occur anywhere in your aorta. Having an aneurysm increases the risk of rupture or an aortic dissection — a tear in the lining of the aorta, shown in the image on the right. This image shows a thoracic aortic aneurysm.