Abdominal aortic aneurysms (AAAs) are commonly described based on the relation to the renal arteries.
- Suprarenal AAA: The aneurysm involves the origins of one or more visceral arteries but does not extend into the chest.
- Pararenal AAA: The renal arteries arise from the aneurysmal aorta but the aorta at the level of the superior mesenteric artery is not aneurysmal.
- Juxtarenal AAA: The aneurysm originates just beyond the origins of the renal arteries. There is no segment of nonaneurysmal aorta distal to the renal arteries, but the aorta at the level of the renal arteries is not aneurysmal.
- Infrarenal AAA: The aneurysm originates distal to the renal arteries. There is a segment of nonaneurysmal aorta that extends distal to the origins of the renal arteries.
