@blue850- I am seeing your post years after you wrote it. So you are now about 10 years post treatment and hopefully doing well. I stumbled upon this Mayo clinic forum after searching for answers for the very same issues you address here. I finished radiation exactly one year ago and had a revision on my implant four months ago. It is already tightening, getting higher, and and painful just as it was after radiation . And the chest tightness feeling/shortness of breath sensation and arm tightness under my right arm is always a struggle. So I'm back to trying to stretch constantly. I greatly value your perspective on this subject so I can be more realistic and not so discouraged. I don't normally comment on these kinds of things. So I really hope you see that I appreciate your post for what I'm going through right now.