Male breast cancer is very rare, with the incidence of 0.15-1% of all breast cancers and less than 1% of all cancers in men. The prognosis of male breast cancer is poorer than that of female because the median age of detection of the disease is in more late stage. IT usually involves higher axillary lymph nodes. We report two cases of male breast cancer to describe characteristic mammographic and ultrasonographic findings and to compare with the findings of gynecomastia.