@hmcski Thank you. Have you had a full work up for your symptoms? Thoracic outlet syndrome is often missed and may be more common in spine injury patients because it may be caused by a whiplash.
https://www.mayoclinic.org/diseases-conditions/thoracic-outlet-syndrome/symptoms-causes/syc-20353988
It can cause arm pain symptoms, and so can radiculopathy and that should be evident on MR imaging. That of course may confuse a diagnosis. When I went to Mayo, they did confirm that I had TOS in a vascular lab with blood pressure cuffs on my fingers and moving my arm into different positions measuring when it was cutting off blood flow due to the compression from TOS. I clearly did have a collapsed disc with spinal cord compression, and they determined that the spine was the bigger problem. I have continued working with physical therapy for TOS and it has been 8 years since my spine surgery.

Wishing you the best.
Jennifer