Sep 14, 2011 - 5:06 pm
Took a PSA test on 9/12 -- it was 3.56.
Just slightly lower than in June (3.72), slightly higher than in March (3.03) and only slightly lower than in Jan 2010 (4.5) before my biopsy that led to CK treatment in Sept 2010.
Don't know what this means. It has been essentially "flat" for the past 9 months, after going up as high as 29.7 (post biopsy) and 12.30 (post treatment). The trend is generally down but it's no where near where other people (like Kongo) say their post-RT PSA test levels (below 1) were a few months after treatment and is certainly no where near post RP levels below (0.1).
The radiation oncologist says that I might have to wait up to 4 years to hit a nadir and everything is fine if it doesn't go up, but I'm not willing to wait THAT long, especially if the results are not trending down as quickly they "should" be.
Does anyone happen know the degree of error in PSA test results AND does anyone know what the typical post-RT PSA levels (for any kind of radiation treatment -- IMRT, CK, BT, PBT or whatever) are for men 1 year post treatment?
I've seen discussions (but no data) suggesting that the margin of error in PSA testing can be as much as +/- 10% and I've also found an article that suggests that 1.5 is a marker for success post-RT, that PSA levels should drop w/in 18-24 months and that constant (level) or rising results indicates reoccurrence.
I think I'm going to use this article as a baseline for further action and, if my PSA results don't reach 1.5 w/in the next 6-12 months, I'm going to red flag it for further testing/treatment.
Sent an email to my radiation oncologist asking for his opinion on this. Will let you all know what he says in reply.