Left breast solid nodule birads3 indicates a grade 3 left breast solid nodule and is a grading method for breast lesion examination by mammography. Under mammography breast nodules can be categorized into grades 0 to 6. Grade 1.0 to 3: Grade 0 generally refers to the incomplete evaluation information of the patient, and other relevant imaging tests need to be performed on the patient for judgment; most of the grade 1 to 3 nodules belong to common benign foci, grades 1 and 2 belong to benign nodules, and grade 3 nodules have a high probability of being benign, and need to be reviewed regularly, with a low probability of their risk of cancerous transformation. Grade 2.4: Breast nodules above grade 4 are at risk of cancer. The higher the grade of the nodule, the higher the likelihood of cancer risk. Grade 4 can be divided into 4a, 4b and 4c categories, and the risk of the patient’s nodules becoming diseased increases with the increase of the grade, and about 5% to 95% of the nodules should be considered as cancerous. 3. Grade 5 to 6: Nodes in grade 5 or 6 are basically malignant tumors of the breast; grade 5 is basically considered cancerous, and grade 6 is diagnosed as cancerous. So left breast solid nodule birads3, represents basically consider this solid nodule mostly belongs to benign nodule. Found the breast nodule is recommended to go to the regular hospital consultation, by the specialist doctor guidance analysis, under the guidance of the doctor standardized treatment.