Cancer makes the world a small place. Lost my grandmother to it, my mother had it and so has my wife and myself. You just deal with it and move on as best you can. It's one of the things like advanced old age and alzheimer's that makes death a release from pain if it can't be cured.
May God welcome the ones who pass from it and comfort the ones left behind.

Some day there may be a cure, I hope it's soon.