Which of the following statements about popliteal artery aneurysms is/are correct?

A. They are the most common site of peripheral artery aneurysms

C. For a patient with a popliteal artery aneurysm the risk of a contralateral popliteal aneurysm is approximately 50%.

DISCUSSION: Although rare, popliteal artery aneurysms are the most common site of peripheral artery aneurysms. While the incidence of associated aneurysms in patients with popliteal aneurysms is high, the opposite is not true. The likelihood of a patient with an abdominal aortic aneurysm having a popliteal artery aneurysm is less than 10%. About 50% of popliteal aneurysms are bilateral. The most common presenting symptom in patients with popliteal aneurysms is leg ischemia, secondary to either thrombosis or embolism. Local symptoms due to the aneurysm are relatively rare. Ultrasonography is the best test for diagnosis of a popliteal aneurysm. Arteriography should be reserved for patients undergoing operative repair.