GFB said...
MRI in September 2017 showed significant decrease in volume of the cancerous mass from a ball of about 1 inch diameter before cyberknife to a volume about 1/8 of the original volume. Doesn't that indicate much of the cancer cells were killed?
Yes, which is good. You also have an intact prostate capable of putting out its own benign PSA. Or it may be systemic. When your T is normal and if your PSA>2.0, you can get a PET scan to see if there are distant mets.