[Reoperation for a giant aortic arch aneurysm using cervical cannulation of the common carotid artery for cerebral perfusion after the ascending aortic replacement; report of a case].

Reoperation for a giant thoracic aneurysm touching the sternum needs to be performed with special precautions. The patient was a 65-year-old man who had undergone ascending aortic replacement due to acute Stanford type A dissection 5 years previously. He visited an outpatient clinic after an interval of 4 years, and was diagnosed with an aortic arch aneurysm which was touching the sternum. Preoperative examinations suggested a high risk of rupture if resternotomy was performed. Therefore, we performed resternotomy under cardiopulmonary bypass. In addition, the left carotid artery was secured for cerebral perfusion through a neck incision, which enabled core cooling in case of uncontrollable hemorrhage. He successfully underwent aortic arch replacement, and he was discharged without any neurological complications.