Many women are «triple negative» No one yet knows precisely why, but African - American women are roughly twice as likely as white women to have triple - negative breast cancer — so called because tumor cells in this particularly
aggressive form of the disease test negative for estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER - 2).
Women with particularly
aggressive forms of breast cancer could be identified by a
test that predicts whether the
disease is likely to spread to the brain.