PECAM1 and intrahepatic cholangiocarcinoma: In contrast, in we did not find CD31+ (endothelial marker) and cTnI+ (cardiac marker) cells in the c-kit+ population before differentiation by ICC, but a small percentage of α-SMA+ (4.1±0.4%) and cardiac α-SA+ (9.3±2.0%) was detected (Figure 10, n = 3 patients).