Localized infiltration of low-grade intraductal carcinoma is considered to be relatively not serious, and most of the patients are able to obtain better therapeutic effect, and patients can survive for a long period of time with a better prognosis. Low-grade intraductal carcinoma is a kind of carcinoma in situ. Low-grade generally means that the difference between cancer cells and normal cells is not obvious, and intraductal carcinoma indicates that the scope of cancer is relatively limited, and the cancer cells are confined in the duct, and there is no periductal spread, therefore, this kind of lesion is generally staged at an early stage, and the occurrence of localized infiltration is generally not too serious. The main treatment measure for low-grade intraductal carcinoma is radical surgical resection, and most of the patients do not need to be given adjuvant radiotherapy after surgery, and most of the patients can be cured after surgery, and their condition is not serious and their prognosis is good.