Aortoiliac occlusive disease occurs when your iliac arteries
become narrowed or blocked. The aorta, your body's main artery,
splits into branches at about the level of your belly button. These
branches are called the iliac arteries. The iliac arteries go
through your pelvis into your legs, where they divide into many
smaller arteries that run down to your toes. Aortoiliac disease is
considered a type of peripheral arterial disease (PAD) because it
affects arteries, which are blood vessels that carry blood away
from your heart to your limbs. -VascularWEB