I had a bone marrow biopsy maybe a year after I was 1st diagnosed, and let me tell you, it took 2 nurses to push that "probe thing" into my back side of hip bone as my bones were very hard and that was a real painful experience. I'm in my later 60s and the following year the clinic asked me if I wanted to be a bone marrow DONOR.....imagine that! I said , "NOOOO!!!!" and they looked at me like I was crazy, so when I got ready to leave after my 6 month exam/testing, I thought I might slip into the restroom to see if I had "STUPID" tattooed on my forhead!! I am not into EXTREME PAIN, and "if" it wouldn't have been so difficult and PAINFUL, I would have said "YES," to help some other patient live longer, but I compared this to a "spine testing procedure," they call a "Discogram," performed by a spine surgeon, where they Xray guide a needle into a disc in the spine pressure it up and the patient is suppose to tell them when the pain is a 10 (MAXIMUM) and that way they can look at a monitor and see which disc doesn't take much P.S.I., and THAT is the one they concentrate on for "treatment!" Those 2 procedures are my WORSE PAINS I've ever had in 60+ years on this planet!😖🫣😵‍💫