Also if it's required ask about a 'cyber knife'. They don't mention it because of the cost. However in lots of circumstances it is the best solution with regards to the brain.
Unless one is a millionaire, or of the Upper Class, I doubt this treatment is available. Those with wealth are deemed more worthy of revolutionary, hideously-overpriced treatments. Me, myself, I consider all illnesses and disease curable, however one has to be privy to those cures via monetary wealth and social standing.
It's worth inquiring though, as this seems a very good treatment...
...still, there's no better cure than the indomitable human spirit in the face of tragedy or crisis.
Hope your wife kicks the shit out of this brain tumour, Noggin, she sounds like a very strong soul so the chances of a positive outcome are increased tenfold.
All the best to you and her, be strong for her, but don't heap the darkness on yourself. Find your own way through.