[A left subclavian arterial aneurysm ruptured into the left lung--a case report].

A 68-year-old man complained bloody sputum. Angiography revealed the left subclavian arterial aneurysm that was arising from the origin of the left subclavian artery. The aneurysm was resected with the adhesive lung tissue through a left posterolateral thoracotomy in the third intercostal space, and an 8 mm EPTFE graft was implanted between the aortic arch and the left subclavian artery. The aneurysm was filled with old thrombus and it was ruptured into the left lung. The pathologic study showed typical atherosclerotic changes. Postoperative course was uneventful, and his bloody sputum disappeared.