Breast cancer is one of the few curable solid malignant tumors; a solid tumor refers to one that forms a mass or has a tangible tumor body. However, the prerequisite is that the breast cancer must be in its early stages, as advanced breast cancer is currently difficult to cure, and not all early-stage breast cancers can be cured. With standardized systematic treatment in modern medicine, about 60% to 70% of early-stage breast cancers can be completely cured. However, 30% to 40% of early-stage breast cancers still develop into advanced-stage breast cancer. This is one of the reasons why long-term monitoring, close follow-up, and regular re-examinations are necessary for breast cancer management later on.