“…PsA of the ascending aorta is a potentially fatal complication after thoracic surgical procedures, usually related to aortic cannulation, the needle vent site, the proximal site of venous or arterial graft anastomosis, the suture line of aortotomy, or the aortic clamp site [Tochii 2011]. Infection, connective tissue disorders, preoperative hypertension, aortic cannulation, blowout of the aortotomy, vasculitis, and prior aortic or cardiac surgery are important risk factors for PsA [Almeida 2008]. But etiology of the aneurismal formation still was not clear.…”