There is no way to determine which is more serious, malignant lobular tumor or breast cancer, they are both malignant tumors of the breast. Breast cancer is considered to be a malignant tumor caused by the uncontrolled proliferation of epithelial tissues in the breast due to the action of various carcinogenic factors, such as hormone action, hereditary factors and mental factors, etc. In the early stage of the disease, it usually manifests as breast lumps, nipple and areola changes. In the early stage of the disease, it mostly manifests as breast lumps, nipple and areola changes, and in the late stage, distant metastasis of cancer cells may cause multi-organ lesions, which, if more serious, will jeopardize the patient’s life and health. When the above symptoms appear in the body, it is necessary to go to the hospital for physical examination in time, and further do mammography, breast ultrasound and breast MRI and other related examinations to confirm the diagnosis.