Hi Andrew,
I had some similar issues - the diagnostic tests didn't in the consultants' views match up.
My PSA was 57. TRUS found one tiny bit of G3 in one out of 12 cores, which they'd normally ignore.
MRI was T3a, PIRADS 4 - clinically significant cancer likely, but hadn't been found so far. Also it was explained that if a PIRADS 4 doesn't find gleason 4, this casts doubt on the biospy. Bone scan clear, and no suspect lymph nodes on MRI.
Had a template biopsy. This did find more G3 and some G4. However, still some doubt they'd found enough to explain PSA 57.
Booked for Choline PET scan. This didn't happen because it was during the period 18 months ago when no one could make any working isotope. I offered to pay for a PSMA PET scan, but the MDT instead came back with the offer of a full body MRI scan on the NHS, which they claimed was better, so I did that. (I found afterwards that PSMA scans were all booked up for months anyway, due to failure to produce Choline isotope.) Nothing found in the MRI (actually many things found, but nothing related to PCa and nothing else requiring treatment).
Eventually confirmed T3aN0M0. The T3a and the PSA 57 made me high risk.
Radiotherapy recommended. A prostatectomy would highly likely need to be followed by RT, and would probably not be nerve sparing. I picked RT and was referred to a RT specialist centre, Mount Vernon.
Mount Vernon recommended that I follow one of the branches of the PIVOTALboost trial. I was offered to go on the trial, but my onco thought it quite important I was on a specific arm which is not something you can choose on the trial, and so treated me according to that arm of the trial, but not on the trial. This was HT and RT, the RT split 46Gy (23 sessions) external beam to prostate, seminal vesicles, and pelvic lymph nodes (sometimes called whole pelvis or wide beam RT, both wholly misleading), plus 15Gy HDR Brachytherapy to prostate only. No cancer had been found outside the prostate (the T3a was due to bulging), but I was treated on the assumption there were micro-mets in pelvic lymph nodes or seminal vesicles.
I did a couple of other slightly experimental things based on research I read, with the support of my onco and GP. I delayed my radiotherapy to get my pre-treatment PSA down to 0.1, as a couple of papers suggested this could cause better outcomes, or that you could come off HT earlier. I adopted one of the STAMPEDE trial arms of taking Metformin, again without being part of the real trial. There is some correlation with Metformin use reducing recurrence, and evidence it reduces some long term side effects of HT.
I'm 10 months after radical treatment. Only RT side effect remaining is a little rectal bleeding (maybe once a week), and still sensitive to fibre (but nowhere near as sensitive as I was). I will be referred to colorectal to check out the bleeding.
Also still on hormone therapy, probably until sometime next year. This is largely up to me, because of my choice to delay RT to get PSA very low, but my onco will advise. I don't get major side effects from HT, so I'm not looking to stop it quickly, but will probably stick with it for as long as is likely to improve long term outcomes. Sexual function has continued working throughout (one of the reasons I rejected prostatectomy), albeit dulled by temporary loss of libido, but I'm aware I could lose it as a long term side effect of RT anytime up to 5 years out. I do lots of exercise (cyclist, and special gym sessions for PCa patients), which I suspect contributes significantly to getting few side effects from the HT.
Good luck with your treatment, and feel free to ask me anything.