Mammogram is recommended for breast 4a, mainly to rule out breast cancer. Breast nodule grading contains 0-6 grades, grade 1 indicates that the breast is normal, grade 2 is benign, grade 3 is malignant probability <2%, grade 4 is malignant probability ranging from 2%-95%, grade 5 is malignant probability of more than 95%, and grade 6 is pathologically confirmed malignant. Grade 4 is categorized into 3 types: 4a, 4b, 4c. 4a suggests a low degree of malignancy of the breast nodule, and the diagnosis of 4a is recommended to carry out molybdenum target examination and puncture pathology biopsy. Mammogram is the first choice for diagnosis of breast diseases. Mammogram 4a indicates the possibility of malignancy of breast nodules or lumps, and it is generally recommended to have a mammogram, which is a low-transmittance ray that displays images of the formation of various layers of breast tissues, thus determining the presence of lumps as well as microcalcifications. Breast 4a is recommended to do molybdenum target, under the guidance of a professional doctor, according to the condition, symptomatic treatment.