My heart goes out to you. He is such a young man to have this disease.
My father was diagnosed in May and we went to St. Louis for a second opinion. From everything I have read and experienced with my dad, here in MO. no one seems to want to fight this disease strongly. I have read of success using the GTX combo. Your goal is to shrink that tumor enough so that he can have the whipple surgery.
Have you be given the option of a trial? That also may be your son's big chance at survival.
My father is 73 and didn't want to go the chemo route. But if he was a young man, I know he would have wanted to use the big guns to fight.
God Bless.
Vicki