GCA / SCIENCE PHOTO LIBRARY GCA / SCIENCE PHOTO LIBRARY
Aortic aneurism. Coloured arteriogram of a patient's abdomen revealing two aortic aneurysms. The aorta is the main artery of the body, seen running from top to bottom of image. Here, two aneurysms are seen as black balloon-like swellings in the aorta at top and centre. Arteries to the legs (iliac, at bottom) and kidneys (renal, at top) are also seen. Aortic aneurysms are extremely dangerous, being fatal if ruptured, and usually arise from a congenital weakness in the arterial wall. Surgery is essential. Angiography is the X- ray examination of arteries outlined by prior injection of a radio- opaque contrast medium.
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