B: While Takayasu’s arteritis characteristically involves the thoracic aorta and its branches, abdominal aortic branches may also be involved – and in fact may be the ONLY vessels involved.
Type 1: Classic, involving only the great vessels
Type 2: Thoracic aorta +/- great vessels
Type 3: Descending thoracic and abdominal aorta +/- renal arteries
Type 4: Abdominal aorta +/- renal arteries
Type 5: Pan-aortic
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