PDGFRB and intrahepatic cholangiocarcinoma: Recently, it has been demonstrated that PDGF‐D secreted by ICC cells promoted recruitment of myofibroblasts through its cognate receptor, PDGFR‐β.10 Fingas et al33 further emphasized the role of myofibroblast‐derived PDGF‐BB in ICC cell protection through a Hedgehog‐dependent signaling pathway.