aortic aneurysm, familial thoracic 6 (MONDO_0012730, a Monarch Disease Ontology identifier) is any familial thoracic aortic aneurysm and aortic dissection in which the cause of the disease is a mutation in the ACTA2 gene. Also known as: ACTA2 familial thoracic aortic aneurysm and aortic dissection, aortic aneurysm, familial thoracic type 6, familial thoracic aortic aneurysm and aortic dissection caused by mutation in ACTA2.