seventy-five ( 30.9 % ) of the 243 aneurysms occurred in the infrarenal aorta , 65 occurred in the descending aorta ( 26.7 % ) , 56 occurred in the thoracoabdominal aorta ( 23.0 % ) , and 47 occurred in the ascending aorta or arch ( 19.3 % ) .
C0011666
descending aorta
C0003483
aorta