Our prayers go out to your Grandma, and all of you and the family. My Mother had serious heart attack three days ago, and at the age of 98 will have a tough time regaining her strength. It's always hard to know, though, what is a blessing. My Grandfather "lived" to 90 or 91, but the last seven or eight years he was flat on his back in a nursing home bed. He was alive, but not what I think of as living.
I prayer that your Grandma surprises the Doctors, with a remission.
Most of all, I pray that you are all a loving support for each other.
Sometimes people forget that it is the family that needs prayer as much (and sometimes) more than the person who is afflicted..

Jerry