An aneurysm is considered present whenever there is enlargement of abdominal aorta > 3cm
		They are usually 2 to atherosclerosis
		They usually occur below renals and above the iliacs
	About 20-25% rupture
		<4cm~10%; >10 cm~60%
		When  they rupture, they rupture into the retroperitoneum, usually on left side
		If they rupture into the into the GI tract they can lead to massive hemorrhage
		If they rupture into IVC they can lead to rapid cardiac decompensation