Genetic ancestry and social environment may influence how aggressive breast cancer is in Black women

For Black women, breast cancer is the most commonly diagnosed cancer, and as of 2019 it has surpassed lung cancer as the leading cause of cancer death in this population, according to the American Cancer Society. Additionally, studies have shown a high prevalence of triple-negative breast cancer (TNBC), an aggressive subtype of breast cancer among younger Black women and those of African descent.