I don't want to say it's good news, but like you said, it's a best possible outcome. There's plenty of room for optimism in this. Having a MIL that passed from leukemia and my wife having a recent cancer scare, hearing this relatively good news actually brought a few tears to my eyes. My prayers are still with them but my spirit is lifted. This being said, I don't envy them going through chemo with a child for two years. Hopefully it will be less.