This book presents current research in the study of breast cancer. Topics discussed include microRNAs in breast cancer; the role of molecular markers in the diagnosis of breast cancer; breast cancer knowledge and risk factors; immuno-conjugates; multi-drug resistance as a problem challenging breast cancer chemotherapy; signal transduction and metastasis suppression; and, genetically engineered t-cells for adoptive immunotherapy of breast cancer and marina crystal minerals (MCM) induce apoptosis of human metastatic breast cancer MDA-MB-231 cells in vitro.