SBRT-PSA trend

Hi 0311. I'll let others with experience and knowledge address your question. But if you want to track your PSA with some degree of reliability, I think an uPSA test with at least two decimal places is in order. The right-most digit of any lab test is subject to change because of the test method, sample prep, daily fluctuation in your level, etc. It's a good idea to round one place (e.g. 2-decimal results to 1 decimal place) to have a more reliable trend. Even then, it can take a number of data points to smooth out fluctuations and establish a velocity or doubling time.

All the best,

Djin

JJ -- I'd have to agree with Tudpock. If we use the traditional definition of failure in RT patients, you would have to hit 2.83 (nadir plus 2.0). You're not there. I would agree to more frequent testing to identify if a new trend is forming or changing, but I would also not be surprised to see your PSA go back down toward nadir. Did you abstain from all related activity for a few days prior to your last blood draw? That can still have an effect, although I don't know how profound it would be.

Have you been tested for prostatitis or prostate infections? Ditto the potential PSA effect -- not known but could happen.

I also fail to see the value of the ultra-sensitive test. You are concerned with the first two digits after the decimal point, not the third, fourth and fifth. If the first two are good, the others don't matter.

You mention the opinion of your uro. Have you spoken with Dr. Hirsch about this? What was/is her take on it? Personally, I would ask her input before making any commitments, as she may have directly related experience. Even if she has released you from her care, I imagine she would still be available for consultation by phone or video conference.

Like you, I have had some PSA bounces, so I am kind of less concerned about any single reading. My last two readings have been the same value (0.96). My next reading is set for December, and I am just a few months behind you on the same path, with the same RO and same machine. I'll keep you posted.

100% with Stephen, consistency is key and changing tests or labs adds another variable that is not needed with your long term monitoring.

I TOTALLY AND COMPLETELY DISAGREE WITH THESE SO-CALLED EXPERTS!!



Not really, but we haven't had a good conflict on HW for a LONG time. We don't want the moderators getting fat and lazy.

C'mon, man!!

Mel