Breast cancer statistics

Abstract

Among U.S. women, breast cancer is the most commonly diagnosed cancer (excluding skin cancers) and the second leading cause of cancer death, following lung cancer. In 2012, an estimated 226,870 new cases of invasive breast cancer and 39,510 breast cancer deaths are expected to occur among U.S. women. Breast cancer rates vary largely by race/ethnicity and socioeconomic status (SES), and geographic region. Death rates are higher in African American women than in whites, despite their lower incidence rates. Historically, breast cancer was recognized as a disease of western countries. However, over the past 20 years, breast cancer incidence and mortality rates have been increasing rapidly in economically less developed regions. According to 2008 GLOBOCAN estimates, half of the new worldwide breast cancer cases (1.38 million) and 60 % of the breast cancer deaths (458,000) occurred in developing countries. This chapter reviews breast cancer incidence and mortality patterns among women in the U.S. and worldwide, and the possible explanations for these patterns.