EPCAM and hepatocellular carcinoma: HCC samples were considered positive for each HPC marker if more than 5% of tumour cells in a single section were stained (Figure 1); as a result, 18.3%, 7.1%, 14.3%, and 8.0% patients were found to have high levels of DLK1, NCAM, EpCAM, and CK19 in tumours, respectively.