Breast BI-RADS classification refers to a data structure based on the severity of the breast. There are 7 categories, ranging from 0 to VI, the higher the number, the higher the risk of breast cancer. 0 is the level that requires re-examination to confirm the diagnosis, I is the level of no problem, II is the level of benign lesions, III is the level of benign lesions that require review and follow-up, IV is the level of malignancy that requires regular follow-up or surgical biopsy for characterization, V is the level that basically identifies cancer in the breast, and VI is the highest level. Grade VI is the highest grade, which means breast cancer is already present. Once you have breast disease, you should go to the hospital for examination in time. The final diagnosis of the disease needs to be combined with breast ultrasound, mammogram and MRI.