Treating thoracic aortic aneurysms

DEAR MAYO CLINIC: My friend was diagnosed with a thoracic aortic aneurysm. What causes this type of aneurysm, and how fast does it grow? Also, how are thoracic aortic aneurysms treated? ANSWER: A thoracic aortic aneurysm occurs when one or more areas along the wall of the aorta — the body’s largest