Atherosclerotic pseudoaneurysm of the left subclavian artery: a case report.

A subclavian artery aneurysm is rare. We report the case of a 61-year-old man with a history of hypertension and angina pectoris who was diagnosed with an atherosclerotic aneurysm of the left subclavian artery. An incidental computed tomography scan revealed a 37-mm saccular aneurysm adjacent to both the proximal left subclavian artery and the distal aortic arch. He underwent an aneurysmectomy with total aortic arch replacement via a median sternotomy. Operative findings revealed that the aneurysm had originated from the left subclavian artery and was located 1 cm distal to the ostium. The final pathological diagnosis was a pseudoaneurysm.