DEAR DOCTOR K: What is an abdominal aortic aneurysm? How is it treated?
DEAR READER: An abdominal aortic aneurysm (AAA) is an abnormal swelling in the aorta, the body's largest artery. It occurs in the part of the aorta between the bottom of the chest and the pelvis. Most aortic aneurysms come from atherosclerosis.