Hi Andy,
I was initially diagnosed in 2007 (G9T3N?M0) and treated with HT and RT.
In 2011 I came off HT and my PSA remained low, under 2, throughout 2011 and 2012, I dared to think I may have been cured.
Then in 2013 PSA started to rise and I subsequently had salvage HDR brachytherapy (full detail in profile).
When my PCa 'came back', I asked the doctors whether it was the original cancer that had survived the RT and HT and was now growing again, or whether it was an altogether new cancer that had grown from nothing in what had previously been otherwise healthy prostate tissue?
I was told that there is no way of knowing the answer to that question.
In my case because I had previously had RT, they didn't repeat the TRUS biopsy and didn't establish a Gleason grade of the new/recurrent cancer, as apparently once radiated prostate cells don't look the same, and second bout PCa cannot be graded in the same way.
But there are lots of 'salvage' options available, maybe RP, definitely RT/Brachytherapy.
I find it useful to make a few notes prior to seeing my consultant, a sort of shopping list which I take into the meeting, that way I make sure that I ask all of the questions I wanted to ask.
Best of luck.
:)
Dave