Since you have had a scan since your first post, this might not relate to your pectoral pain. I began my radiation treatments in June 2023 and ended in July 2023. I had only five treatements using SBRT radiation on stage 1 lung cancer. I began having some pain right after treatment, but it was more discomfort than anything. The doctor sent me to a heart doctor to get checked, heart ok. Eventually it ceased, but it seemed to flare up when I would eat foods that would cause inflammation. After about a year and a half, it started getting bad, especially when I reached up, or used my arms in a repeated motion, like sweeping, etc. When my next pet scan came up, it showed the 7th rib was fractured. Nothing we could do but give it time to heal. After 3 months it was still hurting and the doctor sent me to get x-rays to check how the healing was coming along. X-rays showed the 6th rib broken now, and the 7th not healed. The pain has been under the arm by the breast, in the center of my chest around the breast, and along the back. This pain is on the same side I had the radiation. So for the last 6 months I have been dealing with this pain. Another scan is coming next month.
I was never told that radiation could cause fractured ribs. I did a deep dive on the info for SBRT radiation....and I just pray that it does heal!