EPCAM and neoplasm: These four proteins were EpCAM (epithelial cell adhesion molecule) [32], FADD (Fas-associated death domain protein) [33], NDRG1 (N-myc downstream-regulated gene 1) [34] and αB-crystallin (Alpha-crystallin B chain) [35], and their ratios of metastatic vs. primary tumor sites were 1.85, 1.51, 0.33, and 0.34, respectively.