She did the right thing. She might even defy her dire prognosis, and live longer than her doctors expect.
My great aunt had breast cancer. Her doctors wanted to try all sorts of new "therapies" on her. She opted for a mastectomy, and nothing more. She lived twenty-five more years, not dying of cancer. A client of mine had colon cancer. She had a length of her large intestine removed, and nothing else. Last time I checked in with her, three years post-procedure, she was teaching Senior Movement at the Y, at 87.
I am opposed to chemo and radiation. While I don't want to start a contentious debate, in here, I know, for a fact, that radiation is a mutagenic agent, and chemo introduces poisons into one's bloodstream. I believe both cause more cancers, further down the line, by weakening one's immune system and by causing mutations that may actually create new cancers, eventually.
The Big Cancer Machine, BCM, is out to drain your bank account, while draining your life, at the same time. When the money's gone, you're gone. A cure for all cancers may be found, but its discoverer will not be from the BCM. Cancer "treatments" are a multi-billion dollar industry that keeps oncologists and their support staff in fancy cars and high dollar homes and vacations. To find a true cure would kill the cash cow. It won't happen with anything the BCM is working on. Hopefully, it will happen, in spite of that horrible cancer industry.