The presence of painless lumps in the breast of elderly men is one of the clinical diagnoses of male breast cancer. Male breast cancer (malemammarycancer) is a rare malignant tumor, accounting for 0.2% to 1.5% of all cancers in men and about 1% of breast cancer. What are the screening methods for male breast cancer? 1.needle aspiration cytological examination Aspiration of cells from breast lumps for pathological examination can reveal heavy hyperplasia and suspicious cancer cells. 2.ER measurement Most of the ER receptors in male breast cancer are positive. 3.Molybdenum X-ray examination may reveal a funnel-shaped nipple invagination, burr-like lump shadow in the areola area, radiating blood vessels in the dense area, or sediment-like calcification spots. Mammography is currently the first choice and the easiest and most reliable means of diagnosing breast diseases. It has the advantages of clear photographic images and appropriate contrast, and can clearly show nodular lesions less than 1 cm in the breast, and can be accurately characterized and localized. Mammography can often detect nodules that cannot be reached by physicians, the so-called “occult breast cancer” and very early carcinoma in situ, and can detect early breast cancer two years earlier than experienced physicians. The radiation dose is also reduced to less than 0.003Gy per person (both sides of the four positions), which is not harmful to human body. Even if the clinical diagnosis of breast cancer is clear, mammography should still be performed because it can help clarify the location of the tumor, the extent of tumor infiltration, the presence of multiple cancer foci and the condition of the contralateral breast, which are essential for proper treatment planning.