good luck to your mom
remember it ain't over till the fat lady sings. my mom had breast cancer a few years back. was not in early stages and pretty developped tumor. she is ok now after surgery, chimo, etc... still doing regular checkups to make sure. anyway your mom is early stages and at least it's not lungs or liver so she has a good chance of beating it. also had a college roomate who survived a brain tumor, still alive. my best frinds mom had melanoma and still alive, although no more tanning now.
my point is many people survive cancer, so don't lose hope just yet