With the popularity of mammograms, more and more foci of calcification in breast cancer are being detected. What is breast cancer calcification and what does a breast cancer calcification focus look like? 1.What is breast calcification foci? Calcified foci in the breast are calcium deposits in the breast detected by mammogram. There are many explanations as to why calcified foci appear in breast cancer, one of the more recognized explanations is that there is abnormal calcium metabolism in breast cancer cells, which can cause excessive local calcium deposits, so calcium deposits can often be seen in breast cancer lesions. 2.Does calcification in the breast necessarily mean breast cancer? There are coarse and small calcification foci in the breast. Coarse calcification foci are often benign lesions in the breast, such as calcification of blood vessels in the breast, old injury, inflammation, breast cysts during lactation, benign tumors, etc., while small calcification foci are usually located in areas where cells grow and divide faster, and breast cancer is more likely. 3.Does breast cancer always have calcification? Not necessarily. There are many kinds of clinical manifestations of breast cancer, some of them are mainly manifested by masses and some are mainly manifested by calcified foci. 4.What does calcification of breast cancer look like? Most of the calcifications in breast cancer look like clusters or pinpoint calcifications. In particular, if the number of calcifications exceeds 15-20 within 1 cm, it is more valuable for the diagnosis of breast cancer. 5.Can ultrasound detect calcified foci? Ultrasound can detect only a limited number of calcified breast foci, and MRI has no diagnostic value for breast calcification. Currently, the most cost-effective test to detect calcified foci is mammography. This is one of the reasons why mammography is the main tool for breast screening abroad. 6.What are the advantages of mammography in detecting breast cancer? Mammography can improve the diagnosis rate of occult cancer, microscopic cancer and early cancer. Some breast cancers do not form obvious masses in the early stage and have calcified foci as the first imaging manifestation. Mammography is of great value in screening and detecting calcified foci, so it is of great value for breast cancer with calcification as its early manifestation.