Patty,
I guess I have to chime in on this one. I agree -get a second opinion!!! I don't remember from previous posts - but you are so close to a cancer center? They can give you a multi discipline diagnosis from a tumor board.
If I'm wrong and that's where you are going now I apologize up front. But as Rosie says a second opinion is a must. Take it from someone that was patted on the head (like a good girl) and told I was going to be just fine. (NOT)
Remember also, although not for everyone there are clinical trials available, also.
Take care and I wish you and your father in law the best.
Dinah