Breast Cancer : New cases

An estimated 232,340 new cases of invasive breast cancer are expected to be diagnosed among women in the US during 2013; about 2,240 new cases are expected in men. Excluding cancers of the skin, breast cancer is the most frequently diagnosed cancer in women. The dramatic decrease in the breast cancer incidence rate of almost 7% from 2002 to 2003 has been attributed to reductions in the use of menopausal hormone therapy (MHT), previously known as hormone replacement therapy, following the publication of results from the Women’s Health Initiative in 2002; this study found that the use of combined estrogen plus progestin MHT was associated with an increased risk of breast cancer, as well as coronary heart disease.
From 2005 to 2009, the most recent five years for which data are available, breast cancer incidence rates were stable. In addition to invasive breast cancer, 64,640 new cases of in situ breast cancer are expected to occur among women in 2013. Of these, approximately 85% will be ductal carcinoma in situ (DCIS). In situ breast cancer incidence rates increased 2.8% per year from 2005 to 2009.source:Cancer Facts & Figures 2013. Atlanta: American Cancer Society; 2013