Basically, I have been on Lupron and Zytiga for 10 years, except for 3 vacations from both during my first 5 years. I also had my prostate removed 6 months after dx, which was "experimental" and had the largest tumor in my left acetabulum (hip) radiated 2 yrs after dx.
I started to see a rise in my PSA over the last year along with an increase in the PSA doubling time and thought I would have to shift to a new treatment. PSA had gone from: .06, .07, .10, .22, to .36. Thankfully, I was wrong- at least for the moment.
The PSMA scan indicated to my MO (Rathkoph at MSKCC in NYC) that the only active tumor (of the 4-5 that I have) that "lit up" was the one in my left hip which had been radiated 8 yrs ago. She recommended with radiate again, (this time with the more advanced type of radiation,) and see what happens. First set of labs, about 4 weeks thereafter showed a drop in PSA from .36 to .05. And, this was accompanied by a 1-2 week delay beyond the 3 month schedule for receiving my Lupron shot on time, because I contracted Covid.
I will have labs again in about 2 weeks and remain cautiously optimistic that the total impact of the radiation had not taken effect when the 1st labs were done, and also, that the recent Lupron shot will also help, and hopefully my PSA will drop further, or, at least not increase.
I will let you know.