Fibroadenoma is a common disease of the breast, mostly occurring in young women. Fibroadenoma is a benign tumor in itself, but individual tumors may become malignant due to fast growth, so it is better to remove those tumors that grow faster than 1cm. If you find that the tumor has become large and painful, it should be removed. Ultrasound, mammography and breast enhancement MRI are the most common imaging tests used to determine whether a tumor is malignant or not. Ultrasound examination is usually considered malignant if the tumor is found to have irregular shape, uneven echogenicity and blood flow signal, especially arterial blood flow signal, in the tumor. Mammography (mammography) is also a sign of malignancy if the mass is found to have burrs and more small gravel-like calcifications within the tumor. Breast enhancement MRI can be done when neither ultrasound nor X-ray can tell, which has increased sensitivity but also has false images. At the age of 40 years or older, if there is a lump in the breast that is growing, it should be surgically removed and sent for pathological examination after surgery. The surgery is usually performed under local anesthesia, or under general anesthesia if malignancy is suspected preoperatively. If the tumor is benign, the operation will be finished quickly with cosmetic sutures. If it is malignant, the surgery will continue according to the preoperative agreed plan. Depending on the condition, chemotherapy, radiotherapy, endocrine therapy, etc. may be required after surgery for malignant breast tumors.