The pathology report of breast cancer includes the following aspects: 1) the specific classification, grading and size of the tumor, whether the nipple, skin and other margins are cleanly removed, the situation of lymph node metastasis, and whether there is any infiltration in the vasculature and other tissues; 2) the immunohistochemistry of pathological tissues, by analyzing the indexes of immunohistochemistry, it can guide the next step of the treatment, and it is closely related to the prognosis of the patient. There are many antigens on the surface of tumor tissues, immunohistochemistry of breast is to use these antigens and antibodies to bind, and then use histochemistry to show the binding site, in short, it is the process of detecting certain specificity and particularity of tumor cells.