There is no distinction between benign and malignant breast cancer; all breast cancers are malignant tumors of the breast. In clinical practice, tumors are divided into benign and malignant tumors, usually called carcinoma if they originate from epithelial cells, and usually called sarcoma if they originate from mesenchymal tissue. In addition to this, there are also some junctional tumors, which may evolve into benign tumors or may continue to deteriorate and become malignant. Breast cancer is also a malignant tumor that originates from the ductal epithelium of the breast, and there is no distinction between benign and malignant. For breast cancer, once the diagnosis is clear, it requires timely radical surgical excision, radical or modified radical surgery without distant tissue or organ metastasis, and comprehensive postoperative treatment. Generally speaking, the earlier the stage, the higher the degree of differentiation, the higher the probability of obtaining a cure; conversely, the later the stage, the worse the degree of differentiation, the lower the probability of obtaining a cure.