The MRI report might clarify things more.

Your symptoms made me wonder if some of it could be repetitive/ work /posture related. Thoracic Outlet Syndrome or such..
I saw this - There is no cervical ribs evident. so that is good..
Does desk work or similar use & posture apply?

Also it could be some spine & some soft tissue factors both happening..

If no clear surgical action is required, be sure to ask for some expert PT to see if that helps for you.

Medical Dictionary & MRI/CT Terminology