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Fig. 7C. —82-year-old man with thoracic aortic aneurysm type B and thoracoabdominal aortic dissection extending from just distal to left subclavian artery to proximal right common iliac artery. Patient was first diagnosed with aortic dissection 12 years ago. For more than 10 years, symmetric perfusion of kidneys was seen, until recently when CT showed hypoperfusion of right kidney. Anteroposterior volume-rendered CT image shows right renal artery (open white arrow) originating from false lumen (solid white arrow). Left renal artery (open black arrow) originates from true lumen. Note dissection flap with calcifications (solid black arrow) that separates true and false lumens.