Breast cancer is the most common type of cancer in American women, according to the American Cancer Society. This year, 232,340 women and 2,240 men will learn they have breast cancer. Another 64,640 women will learn they have noninvasive (also called in situ) breast cancer. Breast cancer can often be cured. About 83 percent of all patients with breast cancer live at least 10 years after their diagnosis.