General info: Occasionally I do a general update on breast cancer in case it helps people reading the thread. I'm not a doctor or healthcare professional. I've had breast cancer and I read the research every day. I have access to the calculators that give odds, and can read the science stuff that interprets the odds. So occasionally I say something that is useful. No need to take a bit of notice of any of it. Always ask your teams for expert advice etc etc.
Breast cancer these days has an average 90% chance of long term success for the person.
If it sneaks out of the breast and into lots of the lymph glands under the arm, there's still better than 80% chance of long term success, on average.
If it is nippy enough to get past those and end up in the liver, for example (not common), but only one or two small bits - there's still an 80% chance of long term success on average with the newest treatments.
If it manages to spread to more than just one or two lumps in one extra place in the body (not common either), then teams look at controlling it so it just stops at that size or shrinks down. That can and does give most people years of good life, even at that stage. By which time we could well have even better stuff available that can stop it for even longer.
So, it's now surprisingly hard for breast cancer to kill people. It can manage it, but the teams are getting very good at stopping it doing that.
And most people will find the teams can get rid of it in the early stages.
Once it's got out of the breast and lymph glands under the arm and into the body's bones or other organs such as the liver, that's called Stage 4, and is considered 'incurable'. It does not mean the person will die from it. It means they may be living with it as a 'house guest', maybe for decades. It can pop up again even if people think it's gone. Annoying but not necessarily fatal. They will always be on long term monitoring, even if the team can't see any cancer after it's been removed surgically etc. It is never called a 'cure'.
Treatments these days are amazing. Not fun, but amazing. Teams often do genetic testing and tailor the treatment to the person's own individual cancer and body. And cancers come in all sorts of personalities of their own. Some are lazy ones that grow slowly ('grade 1 and 2' = easy to stop). Others are greedy faster growing ones ('grade 3') that are very thirsty and therefore end up drinking lots of chemotherapy and dying faster (result!!). So the 'grade' of cancer isn't that relevant apart from to the teams.
If you're on chemotherapy, some people are offered it first, before any surgery. That's so the team can watch how the lump responds. If it shrinks at all, that's good news. If it disappears entirely, they do the Hospital Dance of Joy and some high fives, since that puts the odds of long term success up to about 95% for most people. [remember that odds of success include people who are very ill with other things, people whose teams are a bit chaotic and clueless, people who are terribly old etc]
Things that can help - science now shows that vitamin D, low dose aspirin, lactoferrin, curcumin and omega 3 can all help the body do its own defeating of cancer. Ask teams about their thoughts on those. Especially aspirin, as it can cause other problems.
It also helps to have a good social life (we don't know why, but it does, on the research), and to sleep in a very dark room at night.
None of this is a guarantee for anyone. But it's an overview of general info that may be helpful.