Dear Loopy 101
I am sorry to see you here, but you are in the right place for advice.
It is good news to see that your OH cancer has not spread to the bones or lymph nodes, as it means that it is contained and therefore will benefit from the 37 sessions of IMRT that are planned. The IMRT machine is (I understand) the best type that you can get at the moment. I am no expert, but based upon what happened to us, he will remain on HT after the radiotherapy for several years, and maybe forever (permanently or intermittently) it depends how he responds.
I think that you could get a second opinion over the phone, if you are able to send all of your results (bloods, scans, biopsy results etc) over to your chosen clinic. If you ask your Consultants secretary (wherever you are being treated) they should arrange it for you. We did this and asked an Onco at a private Prostate Clinic in London to review the results. She was thorough and informative and we had about an hour on the phone with her. She followed it p with a letter saying that we were getting exactly the same treatment that she would give us in London. This was reassuring.
I would be happy to let you know her name and contact details if you message me privately, as we are not allowed to mention names on here. I would suggest that you research where you go for 2nd opinion though depending upon who specialises in your OH sort of cancer as you said it was quite unique in terms of position. I know of others who have gone to USA for 2nd opinions, and with internet technology you could choose anywhere for this. There are quite a few prostate specialists in the UK and others on here will be able to advise further.
I hope that this helps a little. Thinking of you at this difficult time.
Alison