I had Sumarium as a radiation treatment - mine was too spread out to use direct beam. I never had any real problems with the treatment or pain for approximately 6 to 7 months after the treatment when it restarted we did chemo (Docetaxel) After that when the pain returned I went on the trial I'm currently on and have been pain free after the 5th day of Cabozantinib. Guess my 2 cents is that it works but is not premanent.
Keep it positive and smile :)