The peritumoral PI -DR positively correlates with the intratumoral HPC markers expression. (A) Photographs of immunostaining of hepatic progenitor cell markers in intratumoral sections of tissue microarrays were taken for analyses (sacle bar =100 μm) . High and low density of EpCAM, OV6, CD133 and c-kit expression in intratumoral sections. (B) Scatterplot with fitting line shows peritumoral PI-DR positively correlates with the intratumoral EpCAM, OV-6, CD133 and c-kit expression measured by IOD. Pearson correlation analysis provides correlation coefficient (r) and P-value (right).