Your PSA is coming down nicely.
It is not the trend, but the actual nadir that is most important. Most studies show a correlation between lower nadir and lasting cancer control. Many studies use 0.5 as the target nadir. Reaching that nadir can take a number of years, with bounces along the way, so patience is required. It took me 5 years to reach my current nadir of 0.2.
It actually uncomplicates the readings that you were taking finasteride. It reduces the PSA attributable to BPH, but not the PSA attributable to PC. Then, the radiation fixes your BPH over time. So you are getting a consistent non-BPH reading. Bouts of prostatitis will complicate readings, as radiation does not fix that.
Allen - not an MD
•PSA=7.3, prostate volume=55cc, 8/17 cores G6 5-35% involvement
•SBRT 9 yr onc. results
•SBRT 7 yr QOL results
•treated 10/2010 at age 57 at UCLA
•PSA now: 0.2
No lasting urinary, rectal or sexual side effects