The probability of survival is totally different between mid-stage and late-stage breast cancer, and very few late-stage breast cancers usually can survive more than 5 years, while in mid-stage breast cancer, 60%-80% of patients may be able to survive more than 5 years, so early detection, early diagnosis and early treatment of breast cancer are also very important. Liver metastasis, brain metastasis, lung metastasis are often encountered in clinic, if this kind of internal organ metastasis, it is usually incurable, and the survival period may vary from 1-4 years, but if it is bone metastasis, the prognosis is usually better.