You need consultation from all inputs. Then, with that information, you make your choice of treatment. If surgery then no immediate need for radiology. If radiology then no need for surgical advisement. You now have a decision to make and you need all the input you can gather.

I had/have a Gleason 10. I opted for Proton Beam, 1) for it's pinpoint accuracy and 2) to eliminate the trauma of surgery. The Proton Beam is totally painless, you feel nothing at all. You lay down, get prepped, get treated, get up and walk out in about 15 min. What's not to like?? With Proton Beam the cancer in prostate and lymph node should be accurately targeted and dealt with. If I recall I had 28 treatments.

I still now have a prostate gland. Granted it's been thoroughly radiated, but it's still there.
Be careful, take your time!! Good luck with your decision.