MIRIAM MASLO / SCIENCE PHOTO LIBRARY MIRIAM MASLO / SCIENCE PHOTO LIBRARY
Narrowed abdominal arteries, coloured angiogram (blood vessel X-ray). The aorta, the body's main artery, is at top. It branches into two iliac arteries (bottom), which supply blood to the groin and legs. The stenosis (narrowing) is seen in the right iliac artery (left). It is usually caused by fatty deposits (atheroma) accumulating on the arterial wall.
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