Early detection, early diagnosis and early treatment are the keys to reduce mortality and improve prognosis of breast cancer. Early stage breast cancer is insidious, especially the malignant calcified breast disease which is negative to clinical palpation cannot be accurately located and diagnosed because it cannot be looked for. Mammography is recognized worldwide as an effective method for detecting early breast cancer, especially digital mammography, which clearly shows the microscopic structures of the breast at all levels, especially microcalcifications, and is an important, if not the only, sign for diagnosing breast cancer on X-rays, which has led to the detection of many in situ cancers. The use of mammography has led to a change in the stage composition of newly detected breast cancer cases, and DCIS will eventually develop into invasive cancer if left untreated, while the relative survival rate of DCIS itself is 97% over 20 years. Therefore, early detection of DCIS is very important. With the increase in detection of breast cancer in non-palpable masses, it is a new challenge for breast surgeons to accurately locate the lesion, decide on the surgical approach, and decide on the surgical approach to accurately and reasonably remove the lesion and effectively treat it, while avoiding overtreatment. A new topic. Wei Hongliang, Department of Nail and Breast Vascular Surgery, Xijing Hospital