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Regarding aortic aneurysms, which of the following are true?
a) Abdominal aortic aneurysm is associated with renal artery stenosis (RAS) in 25% of cases
b) Abdominal aortic aneurysm extends to involve the common iliac arteries in 65% of cases
c) Mycotic aneurysm most frequently affects the ascending aorta
d) Thoracic aortic aneurysm is the most common vascular cause of a mediastinal mass
e) Renal failure occurs in 14% of postoperative patients

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