Congenital right subclavian artery aneurysm: a case report.

Aneurysms of the subclavian artery are unusual. The most common causes are atherosclerosis and trauma. We report one case of an elongated and tortuous right subclavian artery with an aneurysm involving the origin of the right vertebral artery. The patient underwent resection of the lesion with an end-to-end anastomosis of the subclavian artery and implantation of the right vertebral artery into the right common carotid artery. Results were consistent with a rare congenital subclavian aneurysm.