RESUMO
A 72-year-old man presented with chief complaints of back pain. Medical workup discovered infrarenal abdominal aortic aneurysm (AAA) with Stanford type B acute aortic dissection on CT. The dissection originated distal to the left subclavian artery and extended to the right commom iliac artery. All visceral arteries branched from the false lumen. The maximum diameter of the thoracic aneurysm was 4.8cm and that of the abdominal aneurysm was 6.5cm. Multiple renal infarcts were noted and the right kidney function was decreased. Initial surgery was performed 3 months after presentation using a graft technique. Advanced atherosclerosis and dissection were noted in the aneurysm making the arterial wall quite vulnerable. Hemorrhage was extensive and hemostasis difficult in the defective arterial wall. The patient became unstable so the aneurysm was closed and the surgical procedure was changed to right axillo-bifemoral bypass rather than the original surgical plan of anatomic reconstruction of the AAA. The patient tolerated the procedure well. We report a rare case of acute aortic dissection which extended through the AAA.
