There are many different types of breast cancer according to their classification, and there are more than five types of breast cancer that have been found so far, specifically the following: first, lobular carcinoma in situ; second, intraductal carcinoma; third, intraductal papillary carcinoma; fourth, papillary carcinoma; fifth, medullary carcinoma; sixth, sweat carcinoma; seventh, squamous cell carcinoma; eighth, mucinous carcinoma; ninth, adenoid cystic carcinoma; tenth, eczema-like breast cancer. These are the types of breast cancer with good prognosis, which account for a relatively small proportion of the total breast cancer. Most of the breast cancers with low differentiation have poor prognosis, mainly the following types: first, invasive ductal carcinoma; second, invasive lobular carcinoma; third, partial medullary carcinoma; fourth, adenocarcinoma; fifth, simple carcinoma, etc. The above is only an approximate classification of breast cancer that has been found, there are still unspecified breast cancers. Clinically, there are also detailed grading and staging of breast cancer according to individual conditions and several indicators such as the impact of the tumor, the degree of invasion, whether there is metastasis, etc. The treatment also differs greatly depending on the grading and staging, so there are far more than five types of breast cancer classification.