Breast MRI suggests a BI-RADS grade 4A nodule, which is clinically considered to be low-grade malignant and suggests surgical excision biopsy or perforation biopsy to clarify the nature of the mass before deciding on the next step of treatment. Breast MRI is an important test for early detection of breast cancer and can be used for staging evaluation of breast cancer, with advantages in detecting tiny lesions, multicenter, multifocal and evaluating the extent of lesions. Imaging BI-RADS classification is divided into 0-6 grades, generally less than or equal to grade 3 will be considered benign possibility, the possibility of malignancy is less than 2%. For grade 4, the likelihood of malignancy rises to more than 5%, with 4a, 4b, and 4c being low malignancy, moderate malignancy, and high malignancy, respectively, and grade 5 malignancy being about 95%. Screening for people at high risk of breast cancer is very important, and it is recommended that breast ultrasound be done every 6 to 12 months, and breast-enhanced breast MRI be done once a year if necessary. Breast cancer should be detected, diagnosed and treated early. If there is any discomfort, consult a doctor promptly. A breast MRI of 4a is recommended for prompt medical attention, and the next step in treatment should be determined by the doctor.