I had SBRT (3 sessions) last August for lung nodules and two months later had an episode of pneumonitis. They put me on Prednisone for 59 days which took care of it. I was told also that because of the episode I could no longer have immunotherapy because of risk. I have multifocal lung cancer (independent primary slow growing cancerous nodules in the lung).
I also have pre-existing pulmonary fibrosis which was stable. My pulmonary function tests dropped considerably recently so I will start an anti-fibrotic drug which hopefully will slow down the progression of the fibrosis. I found a research article that antifibrotic drug may help reduce side effects of cancer treatment as well (attached) ...ask your Oncologist