The aorta, the main artery carrying blood to the body, runs through the middle of the abdomen. An abdominal aortic aneurysm (AAA) results from a weak spot in the abdominal segment of the aorta that causes it to bulge. Rupture of the bulge is a life-threatening emergency because of internal bleeding.

An aneurysm refers to a dilated segment of an artery caused by weakness and thinning of the wall. Leg aneurysms are relatively rare, but occur more commonly than arm aneurysms. Most leg aneurysms develop in the popliteal artery, which passes behind the knee before branching to supply blood to the lower leg and foot.

An aneurysm is a bulge or ballooning of the wall of a blood vessel. This can occur in several of the body�s arteries including the carotid arteries in the neck, which carry blood to the brain, as described by the Cleveland Clinic.

An aneurysm is a dilation or ballooning of an artery or other blood vessel which causes the walls of the blood vessel to become stretched and weakened, as described by Merck, an online medical library.

There is a large blood vessel in your abdominal area that carries blood from the heart to your abdomen, pelvis and legs. When this blood vessel (abdominal aorta) becomes weak and enlarges or pushes outward it creates an abdominal aortic aneurysm.

An aneurysm is a pathologic dilatation of a blood vessel due to weakening of the vessel�s wall. The abdominal aorta is a major artery, which arises directly from the heart and supplies blood to the bottom half of your body. Abdominal aortic aneurysms are usually asymptomatic until serious complications arise.