I have been asking this question as well. This is a known pre cancerous condition but as of now there is no treatment. I think there may be some irons in the fire as on NIH I have read one or two interesting articles and there are a very few trials going on in the country. England seems to have quite a bit to say about MGUS but again I see no validated treatment in the literature. I did come across one article that was promising so keep searching the NIH and the NCI.