As far as I know secondary ca is once in a blue moon

I haven't had anything done that was possible to get secondary cancer. More worried about primary at the moment, I know mm can kill

one of the reasons I chose no treatment; second cancer that was mentioned by my oncologist, when I was about to start maintenance, stuck in my brain and I couldn't dismiss it.

See Larry's posts on the Dana-Farber study. Here are 2 links
https://www.dana-farber.org/newsroom/news-relea...

https://www.dana-farber.org/newsroom/news-relea...

DETERMINATION trial subgroup analysis suggests potential strategies for individualization of myeloma treatment | Dana-Farber Cancer Institute

https://www.dana-farber.org/newsroom/news-releases/2023/determination-trial-subgroup-analysis-suggests-potential-strategies-for-individualization-of-myeloma-treatment

Seems like they have told me everything has chance of secondary cancers. Probably true. My primary cancer is primary concern