Breast BI-RADS classification of 4a lump with burrs is a diagnosis of internal breast space occupation by imaging, and the corresponding lesion has a certain malignant possibility, which needs to be clearly diagnosed by crude needle aspiration or minimally invasive biopsy. The specific condition of the breast mass is determined by the BI-RADS classification, and the higher the likelihood of malignancy, the higher the classification. Indicators affecting the grading include mass size, morphology, margins, tissue composition, relationship to neighboring tissues, and blood flow status. It is currently shown to be category 4a, with a malignancy possibility of between 2% and 10%, and the presence of a burr itself is an adverse sign. Further judgment of the corresponding lesion requires a clear diagnosis through breast gross needle aspiration or minimally invasive biopsy, further diagnosis of specific cytopathological changes, and once malignant tumor cells are found, timely hospitalization is required, and surgical resection is performed under the guidance of the clinician.