You probably did some web searches on TOS & aneurysms already..
If not, and for others that may read in the future..

subclavian aneurysm causes - Google Search


Did drs say what was the cause of your aneurysm?
Perhaps an extra cervical rib, other bony compression or artery anomalies?

There might be past posts mentioning aneurysm here in our TOS forum, you can use the site search to find them. https://www.neurotalk.org/search.php

subclavian aneurysm treatment - Google Search