Pseudoaneurysm of the right subclavian artery
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A young female presented with a painless right subclavian swelling. There is a history of the motor vehicle accident one year ago.
Axial contrast-enhanced CT in the arterial phase demonstrates a 3.4 x 3.0 cm pseudoaneurysm arising from the right subclavian artery.
The right common carotid artery and brachiocephalic artery are intact.
Subclavian artery pseudoaneurysms are a very rare condition. Subclavian artery pseudoaneurysms, in most cases, results from penetrating or blunt trauma, or after surgical/interventional procedures.