Hanover, obviously I don't know what your friend's specific situation is, but from what you've just posted it sounds like she definitely has breast cancer, but is choosing not to have any treatment. Is that right?
If so, I really hope you don't mind me saying this, but from all I've learned going through cancer myself, if you're unlucky enough to find cancer in your breast, it needs to be removed. Alternative therapies won't do that. The cancer will grow and it will spread. Once it reaches vital organs such as liver, lungs, brains it will kill you - might take time, and sorry to be blunt, but that's the simple truth.
Alternative therapies are undeniably brilliant - there's lots they can help with, especially with prevention of recurrence and recovery from treatment, but they really won't remove the cancer.
You sound like a lovely friend and you must support her to do whatever is right for her obviously. But still you have to be realistic. If she really isn't aware of what I've just said so starkly, well she possibly needs to be told. Sorry. Hard to write, let alone hear and feel free to ignore me..!
Hope everyone out there's okay. I see many in need of hugs and 
. sorry to rush through - working away as usual. Have a Monday deadline on something, so might be more sane and around after that. 