Mammogram Breast 4a is defined as a breast nodule with a 2 to 10% likelihood of malignancy. Molybdenum target clinical take birads grading is generally divided into 0 to 6. Grade 3 and below are considered benign lesions, and regular six-month checkups are sufficient. More than grade 3, further examination is required. Grade 4 is divided into 4a, which has a 2-10% chance of malignancy, 4b, which has a 10-50% chance of malignancy, and 4c, which has a 50-98% chance of malignancy. grade 5, which has a 98% chance of malignancy, and grade 6, which is considered to be breast cancer. Mammogram is a common test to check the breast, if the clinical ultrasound found breast nodules, the patient will be recommended to do further mammogram, so that the combination of the two to make a preliminary diagnosis of breast nodules. Then let the doctor guide how to treat is the best. Do molybdenum target examination result is breast 4a, should consult the doctor in time, further improve the examination, under the guidance of professional physicians standardized treatment, so as not to delay the condition.