My dad has been on biannual Decapeptyl injections since october 2017, when he was diagnosed with metastatic prostate cancer. The PSA readings over the last 6 years have been the following:
0.21 (January 2018)
0.07 (May 2018)
0.05 (November 2018)
0.04 (May 2019)
0.03 (October 2019)
0.03 (May 2020)
0.04 (January 2021)
0.04 (September 2021)
0.03 (May 2022)
0.04 (January 2023)
0.04 (May 2023)
0.05 (October 2023)
0.06 (March 2024)
He is currently 87 years old. The oncologist has considered that the blood tests are fine and that the latest increase is (only) 0.01. The next appointment with the oncologist is scheduled for November 2024.
My doubt is that there have been 3 rises from the nadir (0.03) and that the nadir has doubled.
My dad´s general state of health is reasonably good given his advanced age, except for mobility problems.
Should I be worried or rather happy with the results obtained to date?
Thanks in advance,