Ugh, I really hate to hear that man, I said a prayer for you all. Over the last few years my grandpa had some tumors in his stomach. He lost a lot of weight, constantly told me how he "wasn't gonna be around much longer", just didn't have a good outlook on anything. I'm happy to say that he's 100% cancer free now, put a healthy amount of weight back on, and at Thanksgiving he was just as energetic as I remember him when I was a kid. Don't ever lose hope at any point, always keep fighting!