2. Histologic confirmation of invasive tumor will be done by core needle biopsy. On the tissue obtained, estrogen and progesterone receptors (ER/PR) as well as Her-2/neu (will be determined by immunohistochemistry (IH) and/or fluorescence in situ hybridization (FISH)) and p53 will be done (for research evaluation). Tumor proliferation rate will be evaluable by immunohistochemistry using paraffin-embedded sections and monoclonal antibody for ki-67. Residual tumor tissue will be saved in the tissue bank for further future studies.