Friend might have it?

So i have a friend who is about to turn 18. She just went to the hospitol to get testing to Leukemia. She has been sick for awhile, and it all started with a knee opporation. The doctors thought she had Lupus, and then Juvinile on set arumithide arthitis (sorry spelling) and now her blood work shows a good chance of Leukemia. She is 77 lbs and about 5'2, her hands and feet and jaws are swelling and both knees are about three times the size they should be. Anyways, my point of posting this was just to get some thoughts on this and suggestions of support for her, and some more information about all of this. Anything would be help full thanks.