Hi Guys,
All I can add is that looking for 'evidence' about which sort of treatment is best, is often a futile exercise, because amongst other things medical science is progressing so fast, with new treatments and tweaks to existing treatments, that guys like me who have survived 10 years since diagnosis had treatment which has now been superseded.
I was a Gleason 9, and back in 2007, the thinking was that RP was too risky for high grade Gleasons as no matter how careful the surgeon, or robot, is with his scalpel, miniscule bits of cancerous tissue will escape into the blood stream to fetch up elsewhere and start a secondary tumour.
So for me it was easy EBRT was the only option, and if that failed that was it, I was given odds of 60%.
When PCa 'came back' in 2013 things had moved on, whereas in 2007 I had been told that you can only ever have one blast of RT below the diaphragm, suddenly I was being offered salvage HDR brachytherapy, apparently because they cook your tumour from the inside you can now have more than one blast of RT without damaging surrounding tissues!
Not only that, the Consultant asked if I had considered RP, that is RP for what was G9, and RP for a prostate previously irradiated!
Even something as straightforward as 'old fashioned' EBRT isn't the same now as it was ten or twenty years ago, they keep changing the total dose and factions, presumably to make it even more effective.
So when looking at 10 year survival rates, bear in mind that these are based on 'primitive' treatments, and whichever option you choose should give you even better odds.
:)
Dave