Harrison’s Manual of Medicine 20th edition provides 600+ internal medicine topics in a rapid-access format. Download Harrison’s App to iPhone, iPad, and Android smartphone and tablet. Explore these free sample topics:
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Abnormal dilatation of the thoracic or abdominal aorta; in ascending aorta most commonly secondary to medial degeneration (e.g., familial, Marfan’s syndrome, Loeys-Dietz syndrome, Ehlers-Danlos syndrome type IV, bicuspid aortic valve); aneurysms of descending thoracic and abdominal aorta are primarily atherosclerotic. Rare causes of aneurysms are infections (syphilis, tuberculosis, mycotic), vasculitis (e.g., Takayasu’s arteritis, giant cell arteritis), and spondyloarthropathies (e.g., rheumatoid aortitis).