So your markers for multiple myeloma are positive with Amyloidosis?
I don't see a need for a prostate biopsy, but what are your kidney numbers? You said you had high kappa numbers?
Are they referring you to a hematologist-oncologist? A nephrologist (kidney doctor)?
One of my family members has multiple myeloma, and is doing well. They have newer treatments now.
If you do have multiple myeloma, you can ask about it in our Cancer forum - https://www.medhelp.org/forums/Cancer/show/59