Black women had the highest incidence of less favorable breast cancer subtypes, including triple-negative (12.2 per 100 000 person-years), lumina B (6.8 per 100 000 person-years), and ERBB2 (previously HER2 or HER2/neu) enriched (3.4 per 100 000 person-years). Here, ERBB2 is linked to breast cancer.