You folks are a great resource.
Curious on what members know about the 2 PSA tests. My recent bio: finished 6 cycles of docetaxel 11 weeks ago while on ADT(elligard) and xtandi. PSA dropped from 5.7 to 0.12 (roughly halving every 3 weeks). Still on ADT and xtandi. PSA test this week was 0.3, four weeks after the 0.12 test. However, the lab did not have the test code for "monitoring PSA" so they did the "screening PSA". It was a different lab, 1000 miles from my usual lab but under the same corporate umbrella and used the same equipment from what I can tell.
Was surprised by the PSA increase given most of what I had read suggested the PSA would likely continue dropping a bit longer. I know different labs can introduce variability. I could not find much on the web regarding the 2 protocols, other than a monitoring test can be more accurate. ChatGPT was not very helpful. My MO wants to continue monthly testing as expected. He was neutral on whether I should be concerned or not. I won't be able to use my usual lab until mid April.
Anyhow, anyone out there have a similar experience or has some insights?
Thanks.