Molecular Breast Cancer Subtypes in Premenopausal African-American Women, Tumor Biologic Factors and Clinical Outcome

IntroductionBreast cancer is currently viewed as a heterogeneous disease made up of various subtypes, with distinct differences in prognosis. Our goal was to study the distribution and to characterize the clinical and biological factors that influence the behavior and clinical management of the different molecular breast cancer subtypes in premenopausal African-American women.