The one bit of advice I would give is to keep as much normality as possible in your friends life.
My wife who is only fifty was recently diagnosed with Metastatic lung cancer & the one thing she wants more than anything is normality, We try and do as much as possible to keep things normal.
As others will tell you it can be a long road with real highs & real lows, you mention you don’t know what to expect or what to do, don’t worry that’s normal . But always stay positive & keep your friend positive. When my wife came out of intensive care in February they found she had a special mutation in her cancer that meant she qualified for one of the new targeted therapies, its one that’s been called a miracle drug in America, however it did not work & her cancer spread very aggressively In a matter of weeks, but we stayed strong and positive, because these days they are tying new combinations of chemotherapies that also have great results, My wife has just had three cycles of such a mix & the cancer has shrunk back by up to 50% in places.
Her oncologist believes a lot of the response is due to her very positive attitude & I can tell you this is as a result of the many great friends she has around her, treating her as normal, taking her out as normal, taking time just to send her little cards now and again telling her their thinking of her , it really makes the difference.
Another thing I’ve noticed is she prefers it when they chat straight to her, even ifs joking about what colour Wigs she could buy.
Also some of the other posters have recommended different cancer centers where both you & your friend can go for help don’t be afraid to go , & see if your friend would like to go, I was a bit reluctant when we were first approached about a hospice in Sutton & a cancer centre in purely, but then found out from one of My wife’s close friends that she actually wanted to visit them . It was hard at first but my wife has found it helpful and I have realized these places are not like they used to be years ago.
I have also found a lot of helpful advice on a cancer sight called Inspire for lung cancer, but I see there is also one for leukemia that might help you
http://www.inspire.com/groups/leukemia- ... d-myeloma/
Sorry for the long winded post, but once again don’t worry about what to do, your already doing it by being a good friend.