Large Right Subclavian Artery Aneurysm Presenting in a Young Patient.

Subclavian artery aneurysms are extremely rare, accounting for less than 1% all of peripheral aneurysms. They are often due to atherosclerosis or thoracic outlet syndrome and present at an average age of 47 years. Here, we present an incidental finding of an 18 mm rapidly increasing aneurysm involving the first and second part of the right subclavian artery in a woman in her 20s. To our knowledge, this is the youngest patient presenting with a right subclavian artery aneurysm who underwent surgical resection of the aneurysm with repair using interposition graft and successful re-implantation of the vertebral artery with antegrade flow. This report highlights the multidisciplinary care between vascular, interventional radiology and cardiothoracic teams at our tertiary hospital due to the complex nature of the aneurysm.