In which of the following areas is an abdominal aortic aneurysm most commonly located?
A. Distal to the iliac arteries
B. Distal to the renal arteries
C. Adjacent to the aortic branch
D. Proximal to the renal arteries
Correct Answer: B. Distal to the renal arteries
The portion of the aorta distal to the renal arteries is more prone to an aneurysm because the vessel isn’t surrounded by stable structures, unlike the proximal portion of the aorta.
Option A: Distal to the iliac arteries, the vessel is again surrounded by stable vasculature, making this an uncommon site for an aneurysm.
Option C: There is no area adjacent to the aortic arch, which bends into the thoracic (descending) aorta.
Option D: The proximal portion is surrounded by stable structures, lessening the risk for rupture.