Question: are thoracic aortic aneurysms hereditary?
Answer: About 20 percent of people with thoracic aortic aneurysm and dissection have a genetic predisposition to it, meaning it runs in the family. This type is known as familial thoracic aneurysm and dissection. Many people don't know they have a genetic predisposition to thoracic aortic aneurysm and dissection.