Dear DIL
As you can see my husband had the same diagnoses. He is coming up to his 3 year anniversary, so , this is not a death sentence and I hope you do not see it as such.
You, if you are going to be the principal caregiver for your FIL are going to have a rough road ahead of you but, there can be a light at the end of the tunnel .
" Honest!" Try not to panic.

Welcome to the board, if you have searched around you know what a resource of information is available here. I am an avid reader but found more substance right here than in any book I ever read.
Newcomers here are always given the same advice and for good reason,. Comprehensive Cancer Centers are best at treating this disease, even if you have to travel to get to one.

After that my advice would be, to always have someone go with him to the Doctors and have them take notes.
Get him to bulk up as much as possible, he is going to need every last ounce.
I am a great believer in PEG tubes for when he cannot eat, not all our members are.
You will have lots of questions as you go along, we are here to help you answer them if we can.

Take Care
Marica