Chaim,
I just listened and would like to extend my sincere sorrow at hearing the news about your mother. It seems that cancer is a curse on all of us, as my father succumbed to cancer and so too my step-father is now in the late stages of his cancer. My step-dad has been doing chemo (after refusing it for years) and it does take it's toll, but my step-dad has survived his cancer for over 10 years so far... (But it is getting worse).
He has been going to Sloan Ketering (which is supposed to be very good)...
May Hashem grant us a cure one day soon. Your mother should be proud of her son, and you should make sure she knows you love her.