@ban1952 If your asking about how long the radiation fibrosis progresses I suppose it's different in every person depending on the dose of radiation. How serious and debilitating also depends on factors such as over all health, longevity, etc. Once again referring to my cancer Dr. "Radiation, the gift that keeps on giving". It's pretty much never ending. The radiation is gone but the effects continue. The last time I saw the Dr. for a survivorship appointment he said had they known then what they know now I wouldn't have been given as many treatments.