A few days ago, 36-year-old Ms. Xu unintentionally discovered a small lump in her left breast while taking a shower, which was painless and itchy but still caused her alarm. At the hospital, the surgeon first palpated the breast and advised her to have a breast ultrasound. On the ultrasound image, a nodular shadow about 1 cm in diameter was found in the left breast. The surgeon then prescribed a mammogram and told her that she would have to undergo an MRI if she was unsure, or a puncture test to confirm the nature of the lesion. When she heard so many ways to check, Ms. Xu was not quite convinced, and hurriedly went to the Internet to find out that the methods of breast examination were even more varied and complicated than what the doctor had told her, and she fell into a daze. Why are there so many methods of breast examination? In the end there are several kinds of breast imaging, what are their characteristics and differences? Breast examination is best in three steps: the first is self-check, that is, when you take a shower to touch your own breast, there are about two-thirds of the breast nodules are patients self-check, but also a good way to find early disease; after the discovery of the lesion, breast ultrasound plus molybdenum target examination is recognized as the golden partner in the world, the results of the examination can be mutually corroborated, complement each other’s strengths and weaknesses, and for some benign breast lesions, such as hyperplasia, fibroid tumors, or cysts, and so on, is enough; If malignant lesions are suspected by the above methods, then more advanced tests, such as magnetic resonance imaging or fine needle aspiration, are required. Although the tests are expensive, they are accurate, and can be almost definitively benign or malignant, thus determining whether or not to remove the lesion or other treatments. While there are many mammograms, they are not for everyone, and they are carefully selected for accuracy without being overdone. With the knowledge of the three-step mammography, Ms. Xu had a cutting-edge MRI and was finally diagnosed with early-stage breast cancer and had the tumor successfully removed. Ms. Xu was fortunate that she was found early, that the tumor had not spread, and that she did not need to undergo chemotherapy after the surgery.