Abstract
A 53-year-old male patient was admitted with back pain. A diagnosis of DeBakey IIIb type dissecting aortic aneurysm was made based on the results of examinations such as CT-scan and MRI. The right renal artery bifurcated from the pseudolumen. The right iliac artery and left renal artery showed severe stenosis due to aortic dissection. Y-graft replacement of the abdominal aorta was carried out to save the right iliac artery and left renal artery. At the same time, a fenestration operation was carried out to maintain the blood flow of the right renal artery which bifurcated from the pseudolumen. Secondarily, replacement of the descending aorta was carried out with successful thrombotic obstruction of the pseudolumen.