You can look into research and medication being used in other countries. I have a cousin with pancreatic cancer who went to Cuba to get their commonly prescribed drug for pancreatic cancer in that country supposedly. Now, what you need to know is it had already spread to the liver when it was discovered. Anyway, the docs at MD Anderson are shocked at how her pancreatic cancer has not grown. But, her liver continues to get worse. She did do some chemo for a while here also. Pretty much it is accepted that the chemo here in the states is ineffective for Pancreatic cancer from what I understand, but she tried everything. She stopped chemo a long time ago, but continued medication from Cuba. I am not sure what to make of it. I would guess it is the same cancer just spread to different organs, so I don’t understand why it would stop growing in her pancreas and not her liver. I don’t know enough about the science.
Can your mom just monitor her kidney function, and if the numbers begin to get screwy ditch the meds? Or, is it the type of thing if you do damage, the damage is done, and the kidney cannot recover?
Another question, have her antibodies been elevated for a while? You may want to get a repeat test in a couple of months before doing anything drastic, to make sure they really are consistently elevated, but I am not a doctor and know very little about MM, or precursors to MM. I had a coworker who was diagnosed with MM, she was very young, and they ignored her physical complaints for many months until she finally got the correct diagnosis. At least your moms docs are on top of it.
I hope it never develops into anything for your mother. I have a close family friend who’s father had very very elevated PSA levels, which means prostate cancer typically. I cannot remember if he had it diagnosed or not officially as cancer. The thing was he was so very old, and prostate cancer is typically very slow moving, they decided they would not treat it even if he had cancer. A year later his PSA went back to normal.
Good luck and good health to you and your mom.