A bit confused by ‘no cells taken during biopsy’ - isn’t that what a biopsy is? Pretty sure they can do genetic testing of some kind even on biopsy samples already taken, but check on that…
Radiation is weird and side effects really do vary. As a blanket statement, SBRT will cause more SE’s but they should resolve within a short time; but some men have zero SE’s…
As for the proton/photon comparison, perhaps someone on the board who has had treatment can answer that question. Sounds bogus to me - especially with the high degree of technology we have today - but I just don’t know. Best,
Phil