I hope things go well and it does not affect your hands. I am a pianist and I really sympathize with you. I would talk any recommendations the medical professionals tell you. In addition, I would like to share that my husband's doctors had him take vitamin B6 and maybe another B vitamin to help prevent/repair damage. Maybe you could ask about that. The main thing I would like to tell you is that he has improved far past the point that they told him would be possible by simply squeezing a racquetball. He did not have breast cancer, but he did have chemo and he had significant peripheral neuropathy. There came a point that they told him he would never improve any more, but he really did. I can see it in his handwriting and in the tiny things he like to work on like micro-circuits. It couldn't hurt to try it. He says to just squeeze it while you are watching TV or bored or waiting in a line or whatever. Maybe this could help.