African-American women are more likely than white women to die from breast cancer, regardless of their estrogen receptor status, according to a new study by the National Cancer Institute. African-American women are more likely than white women to develop breast cancers that lack estrogen receptors, a factor that can make the cancer more aggressive and difficult to treat.
"We were surprised to discover that estrogen-receptor status only accounted for a portion of the disparity," said lead author Idan Menashe. Other reasons for the disparity remain unclear, but in part may reflect racial differences in access and response to innovative breast cancer treatments, the authors said.