One of the common biomarkers for the identification of CTCs is the epithelial cell adhesion molecule (EpCAM), a 30–40 kDa glycosylated type I membrane protein [3,4], which is frequently overexpressed in cancer cell membranes, but is absent from hematologic cells, making the protein a good candidate for use in the efficient isolation of CTCs from blood. Here, EPCAM is linked to cancer.