Breast pathology is rare and complicated not necessarily cancer. The main types of breast malignant tumor pathology are breast sarcoma, non-invasive carcinoma, invasive specific carcinoma and non-specific carcinoma. 1. Breast sarcoma: rare, including mesenchymal sarcoma, fibrosarcoma, hemangiosarcoma and lymphosarcoma. 2. Non-invasive carcinoma: including intraductal carcinoma, lobular carcinoma in situ, eczema-like carcinoma of the nipple and so on. 3. Invasive specialized carcinoma: papillary carcinoma, medullary carcinoma, tubular carcinoma (highly differentiated carcinoma), adenoid cystic carcinoma, etc. 4. Invasive non-specific carcinoma: invasive lobular carcinoma, invasive ductal carcinoma, sclerocarcinoma, simple carcinoma, etc. Pathological findings of the breast often involve more specialized vocabulary. If you have any doubts, it is recommended to consult your doctor in time.