Michelle, I am so sorry for your friends.  I know how hard it is to go through all the treatments and tests.  I know it is also hard for you as their friend.  I have a co-worker who lost an 11 year old niece to cancer.  There is just not much you can do or say except give them your love.  This is why I am so determined to do Relay for Life and other projects in the future to fight this dreadful disease.