ERBB2 and breast carcinoma: Potentially informative salivary tumor markers in breast cancer are epidermal growth factor (EGF), human epidermal growth factor receptor 2 (HER2), vascular endothelial growth factor (VEGF), carcinoembryonic antigen (CEA), CA15-3, and oncogenic tumor suppressor protein (p53) [17,18,19,20].