Signs of malignancy on mammogram are often seen as a high-density mass in the breast with burrs on the edges; clusters of microcalcified spots; twisted and thickened milk ducts, and dense tissue. Breast malignant tumor is the common clinical breast cancer, mammography is a common examination of the breast, also known as mammography. Breast cancer on the molybdenum target is commonly manifested as ① a lump in the breast, the density is higher than the surrounding tissue, the edge can be seen burr sign. (2) Scattered clusters of microcalcifications can be seen in the interior of the lump, and some breast cancer patients may not be accompanied by lumps, but only microcalcifications. Some patients with breast cancer may not have lumps, but only microcalcifications. (3) Mammogram also shows twisted breast ducts and ductal hyperplasia, and some patients can also see skin thickening in the mammogram. If you have breast cancer, it is recommended to go to the hospital in time, follow the doctor’s instructions for treatment, and do not use drugs privately, which may cause danger.