Inclusion Criteria:  Patients undergoing full sequence BMRI examination Written informed consent and complete the clinical data questionnaire Through the follow-up database, at least 6 months of follow-up results can be obtained to determine whether the diagnosis result is negative/benign/malignant; for patients who need pathological biopsy, the pathological biopsy results shall prevail to determine the lesion benign/malignant.  Exclusion Criteria:  The breast had received radiotherapy, chemotherapy, biology and other treatments before BMRI. Signs or symptoms of breast disease There are contraindications for breast-enhanced MRI examinations such as allergy to contrast agents. Patients during lactation or pregnancy