Abstract C087: Differences in estrogen receptor-negative breast cancer by race and SEER registry

Background: Estrogen receptor-negative (ERN) breast cancer is an early-stage, more aggressive breast cancer subtype. ERN breast cancer incidence is highest in African American women compared with other races, as well as in southern US regions. However, recent studies have shown that ERN breast cancer incidence is declining for women overall. We sought to understand whether ERN breast cancer is declining similarly in all races, age groups, and...