In reply to gribble:
I am really sorry to hear that. You say "to what extent the prostate cancer has returned" so presumably you have already had treatment? I have been through the mill - laparoscopic radical prostatectomy 5 years ago and had my annual PSA test last week - fortunately no change.
Of course there is a slight apprehension every time I have a check up blood test, but as I have no choice in the result, I try not to let it worry me and ever since I was first diagnosed I have taken the que sera sera attitude to this or any other tests so that I just can get on with my life.
The older I get, the more I realise that the clock is ticking. For every one of my friends who have been diagnosed with life threatening or changing conditions, there are as many others who have died suddenly through an unexpected heart attack, stroke, or even climbing or car accident. We don't know what's round the corner and worrying won't change it.
Good luck and keep up your positive attitude.