Familial Thoracic Aortic Aneurysm and Aortic Dissection, also known as familial non-syndromic thoracic aortic aneurysm and aortic dissection, is related to familial thoracic aortic aneurysm and dissection and microcolon. An important gene associated with Familial Thoracic Aortic Aneurysm and Aortic Dissection is ACTA2 (Actin Alpha 2, Smooth Muscle), and among its related pathways/superpathways are Signal Transduction and ERK Signaling. Affiliated tissues include heart and bone, and related phenotypes are cutis marmorata and abnormality of connective tissue