I thought it odd that an RO and a urologist at a top flight facility that had proton therapy in house would discourage its use for prostate patients, if all there is to it is cost or specific side effect profiles. Medicare and at least some insurance plans pay for protons.

I could see specialists telling their management that until there is a clear advantage shown for protons they don't see the point in spending the tens of millions of dollars to build such a facility to administer them. But once they've got protons in house, there must be some reason in their minds that they would discourage proton use for a particular cancer type. I didn't explore the issue as the appointments were short and there were more urgent things on my mind.