October is Breast Cancer Awareness Month. Breast cancer is the most common cancer in women in the United States, aside from skin cancer. The American Cancer Society estimates there will be 230,480 new cases of invasive breast cancer diagnosed among women in the United States this year. Males also can be diagnosed with breast cancer, but male breast cancer cases make up less than 1 percent of all cases of breast cancer. Today, there are about 2.5 million breast cancer survivors in the United States.