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Three-dimensional computed tomography (CT) scan of the interior of an abdominal aortic aneurysm (left) treated with a stent (right). The division of the aorta into the two iliac arteries is seen in the background. An aneurysm is a bulge in a vessel due to the dilatation of its wall. A ruptured aneurysm can be fatal. The treatment includes removing the damaged part of the artery and replacing it with a graft that is held open by the reticulated cylindrical structure of a stent (blue).
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