A thoracic aortic diameter which is ? 50% greater than normal, is considered aneurysm (the normal diameter is dependent on the precise location). Most thoracic aortic aneurysms do not cause symptoms, although some patients have chest or back pain; Other symptoms and signs are usually the result of complications (eg. as dissection, compression of adjacent structures thromboembolism, rupture). The risk of rupture increases proportionally with the size of the aneurysm….
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