Hello Heidi and welcome.
First thing, go to every Drs appt and take lots of notes because you will never remember everything they tell you .
Advise him to get a PEG /feeding tube, inserted before he starts his treatment.
Try and get him to "bulk up" now while he can still eat, he will lose weight.
There is information on every step through this process on the board..take the time to read it,it will be invaluable to you.
Please know you are not alone, there are people on here who have been through everything this rotten disease will throw at you.
We are here and we care.

Marica