ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Abdominal aneurysm. Computed tomography (CT) scan of a section through the torso of a 65-year-old patient showing stents (white, mesh) in position to treat an aneurysm affecting the thoracic and abdominal aorta. An aneurysm occurs when an artery wall weakens and swells like a balloon. If it bursts, an aneurysm can cause severe internal haemorrhage. Stents are mesh tubes that are used to support and strengthen the artery to stop it bursting.
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