David and Jack:
I know there is something called CTC (Circulating Tumor Cells). They can get a number via a blood test. I'm not sure how useful it is and I don't think you can get a revised GS from this test, but maybe?
The deeper question is: what good would that do at this point?
The PSA is an excellent marker to track the progress of the cancer (except where the cancer gives off very little PSA), and then you have assorted scans.
David -- you probably need to get those scans forthwith. Is there a reason you are choosing the PET Scans? Are they supposed to be better or more accurate than regular scans? Is the radiation less (or are the SE less)?
I'm curious because in the last 3 weeks I've had a bone density test (the QCT one), and CT scan, and whole body bone scan. Having had a somewhat unpleasant time with the SRT, I am not pleased to have gotten more radiation, but I know it was necessary.
I'm just checking in here now quickly. My appointment with a local medical oncologist is in 45 minutes and I'm sure he will have all of those results. I am not looking forward to that -- lots of trepidation. I admire your tranquility in these choppy waters!