I had an autologous transplant almost exactly two years ago. Yesterday I saw my transplant doc, and was told, first, that in his experience people with 'high risk" (17p deletion) multiple myeloma generally relapse within three years of diagnosis, and have a tough time. However, I'm still in 'complete remission," as in ... absolutely no sign of high proteins anywhere. My only problems are related to the cure! Some of those side effects are annoying.
One thing he did mention was interesting: a second autologous transplant when I finally do relapse (I have enough cells stored for one more), because 'the first one worked so well." He also talked about other things, like pomalidomide (Pomalyst, Imnovid) and other new 'novel' agents.
This is the first time he has mentioned that possibility to me; he's been a bit on the negative side regarding a second transplant, partly because of my age; if things go as they are going, I might well be over seventy before I would need one.

What is the current medical opinion of second transplants?
I got the impression that the field is trending against FIRST ones, what with the new treatments coming available. Does someone know what's going on with this? Any studies I can look at?
After all, he was right; the first one worked REALLY well for me, so if a second would work equally, or even half, as well, I'll do it in spite of the fact that the first one wasn't exactly a vacation in the Bahamas.