Sending healing/surviving mojo and prayers your way. I got plenty and to spare.
In the meantime, I'm sure you're educating yourself on what he has. There are more resources online than you can shake a stick at,

"liver cancer" and go down the list until your eyes cross and your brain short-circuits. That's what I did for mine. Knowing thine enemy makes a world of difference.
LiveSTRONG Day is coming up next Wednesday, find out if there's something happening in your area. We're having a press event in Washington D.C. between 1:30 and 2:30 that day too, so watch the news. Get the bracelet too, it's only a dollar and it chases the feeling of isolation far, far away. Heck, get a ten-pack and give them to the whole family.
Refuse to surrender! Don't allow him the luxury of "why me?" He got tough with you when you were a kid, if he falls into the self-pity trap pay him back to the penny! Then hug him.
If you want to talk, I'm available. Just PM me. I mean that!