The ACR-C is also known as a mammogram of the breast, and the ACR-C is a grading of the test results. It usually means between grade 2 and 4, with grade 2 being a benign tumor, grade 4 being considered breast cancer, and grade 3 being considered benign breast hyperplasia, although further professional diagnosis is required. The clinical diagnosis of ACR-C grade mammogram is indicated by the image shown in the mammogram, and grade C can be interpreted as an inhomogeneous dense breast. This type of breast grading is a clinical classification standard for the glandular content of the breast during a mammogram, and will classify the breast into four types: A grade is fatty breasts, where the breast structure is dominated by fatty tissue with little glandular content; B grade is fibrous glandular, and adult women tend to have this type; C grade is inhomogeneous dense; and D grade is dense. In the absence of a clear diagnosis, do not have too much psychological pressure, consider endocrine therapy, maintain a stable mood and actively cooperate with treatment.