Patients undergo tissue and ductal fluid sample collection at baseline and at surgery for correlative laboratory studies. Tissue samples are assessed for histomorphology, proliferation (Ki67), cell death (apoptosis index), genetic markers, necrosis, inflammation, and loss of heterozygosity by HE stain, IHC, TUNEL, and PCR. Nipple aspirate and ductal lavage fluid samples are analyzed for cytomorphology (cellular atypia), proliferation (Ki67), cell death (TUNEL), differentiation (G-actin), and genetic markers (FISH) by quantitative fluorescence image analysis. Samples are also analyzed for bFGF and CEA by ELISA, and methylation by PCR.