I am sorry your father died of multiple myeloma. One of my friends died recently of this same disease. I could get this too from what is being told to me by doctors. My Kappa LC is high, but all my other blood work is just fine. I am not tired, no night sweats, no weight loss (I could use it). I don't know what is going on with me. No family with multiple myeloma and I have researched the family tree. One of my friends has MM and also high Kappa LC and her doctor put her on medication to lower it. Is this a possibility? My diagnosis also says MGUS. I wish I knew what was happening to me.