Aortic Aneurysm, Familial Thoracic 9, also known as aortic aneurysm, thoracic, with or without aortic dissection, is related to aortic aneurysm, familial thoracic 10. An important gene associated with Aortic Aneurysm, Familial Thoracic 9 is MFAP5 (Microfibril Associated Protein 5). Affiliated tissues include smooth muscle and artery-aorta, and related phenotypes are dural ectasia and high palate