A case-control analysis of oral contraceptive use and breast cancer subtypes in the African American Breast Cancer Epidemiology and Risk Consortium

Conclusions: Our results suggest that OC use, particularly recent use of long duration, is associated with an increased risk of ER+, ER-, and TN breast cancer in African American women. Research into mechanisms that explain these findings, especially the association with ER- breast cancer, is needed.

http://breast-cancer-research.com/content/17/1/22

Source: Breast Cancer Research - February 21, 2015 Category: Cancer & Oncology Authors: Traci BetheaLynn RosenbergChi-Chen HongMelissa TroesterKathryn LunettaElisa BanderaPepper SchedinLaurence KolonelAndrew OlshanChristine AmbrosoneJulie Palmer Source Type: research