Aortic Aneurysm, Familial Thoracic 2, also known as aneurysm, aortic, thoracic, familial, type 2, is related to aortic aneurysm, familial thoracic 1. An important gene associated with Aortic Aneurysm, Familial Thoracic 2 is ACTA2 (Actin Alpha 2, Smooth Muscle). Affiliated tissues include adipocyte and smooth muscle.