I've been too busy posting silly album covers to take note of this thread (sorry), but let me now join thoise who have voiced their sympathies, concerns, and opinions that other medical care be sought.
My only "advice" is to echo those who have suggested seeking not only a doctor, but a dedicated oncology facilty, preferably one that is constatnly involved in ongoing research. There's always the fear, not totally unfounded, that the patient will be used as a "guinea pig", but there's also the reality that such places are also usually aggressive in treatment and have access to state-of-the-srt equipment and techniques.
And stay strong - it will sometimes seem impossible, but somebody in the family needs to stay centered because there's quite possibly one hell of a roller coaster ride ahead. Remember - no matter how deeply you love your Mom, your dad loves her at least as deeply, and he's know her longer than you have. You'll need to be there for him too.
Again, you and yours have nothing but my best wishes and will be in my prayers in the days ahead.