Black women who are diagnosed with breast cancer have a higher probability of dying from the disease than white women, regardless of their estrogen receptor status, according to research from the National Cancer Institute (NCI), part of the National Institutes of Health. Differences in breast cancer mortality may reflect racial differences in access and response to innovative breast cancer treatments, as well as other biological and non-biological factors, according to the report. In addition, the researchers found that differences in outcomes in the first few years post-diagnosis make up nearly all of the disparity. These results were published online July 7, 2009 in the Journal of the National Cancer Institute.