Aneurysms can be treated conservatively. This is because aneurysms are determined by the diameter of the aneurysm and the rate of development. For example, in domestic abdominal aortic aneurysms, the aneurysm diameter reaches 5 cm or more before the indication for surgical treatment. For those less than 5 cm, CT is recommended every year of follow-up to see the growth rate of the aneurysm. If the change is not significant for 5-10 years, conservative treatment can be done. There are also patients who have aneurysm or rupture but cannot do surgery by themselves, they can only do conservative treatment.