KIT and intrahepatic cholangiocarcinoma: Recent data have shown that besides the aforementioned Kit signalling pathway, there are additional signalling pathways which play a role in the differentiation and proliferation of ICC (neuronally derived nitric oxide, serotonin signalling through the 5‐HT2B receptor, interleukin 9, insulin and IGF‐1 signalling through stem cell factor) 13, 14, 15, 16.