So sorry to hear this about both being coupled as in your case!
Amyloidosis sometimes seems to be a result of the light chains getting deposited in your organ tissue, some types of monoclonal gammopathys tend to do that and others don’t. I have heard that this is more seldom gamma M protein but I am not sure.
I guess you probably know more by now.
Which myeloma do you have?
Wishing you all the best!!
Mascot