Aortic Aneurysm, Familial Abdominal, 2, is also known as aortic aneurysm, familial abdominal 2. An important gene associated with Aortic Aneurysm, Familial Abdominal, 2 is AAA2 (Aortic Aneurysm, Familial Abdominal 2). Affiliated tissues include liver.