[Mediastinal Bronchial Artery Aneurysm Resected together with the Descending Aorta under the Partial Extracorporeal Circulation;Report of a Case].

Bronchial artery aneurysm(BAA) is quite rare, but its rupture is often lethal. Once it is found, treatments should be aggressively considered. A 67-year-old woman was diagnosed to have a 26 mm mediastinal BAA on computed tomography (CT) which was performed for screening.