Scattered small rounded or irregular calcified shadows in both breasts with clear borders are most commonly seen in breast hyperplasia, breast cysts, breast cancer and so on. 1. Breast hyperplasia: Calcification of breast hyperplasia is one of the more common pathological changes in the breast, which may be related to endocrine dysfunction, and may be accompanied by breast pain, nodules and other symptoms. 2. Breast cyst: it is a benign disease, which is often caused by the proliferation and enlargement of breast cysts, leading to the mechanization of breast glands, thus forming the phenomenon of calcification. 3. Breast cancer: a malignant disease of the breast, often due to the rapid growth of breast cancer cells, poor blood circulation and the phenomenon of calcification. Scattered and multiple small rounded or irregular calcified shadows in both breasts, with clear borders, need to cooperate with the doctor to do further examination and take treatment after a clear diagnosis.