IL33 and cholangiocarcinoma: In large bile duct CCA, a high level of intracellular IL-33 was correlated with a less aggressive phenotype 31 which supports the findings in this work in that KKU-055 CCA cells having high IL-33 revealed less cell migration than KKU-213 and KKU-100 CCA cell with low IL-33 intracellularly.