Dave, I have had two pelvic lymph nodes treated on two separate occasions. On both occasions I had 5 sessions of SABR treatment over a ten day period. There were no side effects from the SABR treatment. On the second occasion I went on six months of Bicalutamide, that did give me a few side effects, mainly it was an increase of breast tissue, my oncologist wouldn't prescribe any drugs to neutralise the effects of the bicalutamide.
Are you going to the Genisis centre at Oxford,I had my PSMA scans there but had treatment done in the East Midlands. There was talk of having the second tumor treatment done at Oxford, mainly due to it's proximity to organs and they didn't think the local RT machine could do it. Fortunately it turned out I could have it done locally, saving a few 170 mile round trips. If you are going to Genisis Oxford they are lovely people there, great facilities, plenty of parking.
Both lots of treatment apparently were successful . I had a further recurrence that found numerous hot spots but the previously treated lymph nodes showed no activity when scanned.
I was happy to chase rainbows but it got to the point were there were too many areas to treat and I started decapeptyl and apalutamide about a year ago.
Hope all goes well.
Thanks Chris