Male breast cancer is rare. It happens most often to men between the ages of 60 and 70. Risk factors for male breast cancer include exposure to radiation, a family history of breast cancer and having high estrogen levels, which can occur with diseases like cirrhosis or Klinefelter's syndrome . Symptoms of male breast cancer include lumps, changes to the nipple or breast skin, or discharge of fluid from the nipple. Treatment for male breast cancer is usually a mastectomy , which is surgery to remove the breast. Other treatments include radiation, chemotherapy and/or hormone therapy.