Breast Cancer rarely affects men, but is the most frequent type of cancer among women. The American Cancer Society projects that 2,030 men will be newly diagnosed with breast cancer in 2007, rising 1.1%. However, 178,480 new cases of invasive breast cancer for women and 62,030 cases of newly diagnosed breast cancer in situ for women are estimated. Over 8% of the population of women in the US will be diagnosed with breast cancer in 2007. Women have a 13.22% chance of developing breast cancer.