We hope to determine the feasibility of obtaining and analyzing both NAF and breast epithelial cells from women with benign proliferative breast disease. These women are at increased breast cancer risk, and the composition of the NAF, which bathes the breast ducts may affect the morphological features of the nuclei in the breast epithelial cells. If the levels of lipid oxidation products are higher in women with large nuclei (a risk factor for breast cancer), then interventions which reduce oxidative stress and cancer risk may be planned in the future.