IL6R and cholangiocarcinoma: To examine the association of IL-6R expression and the chemo-response in CCA patients, the patients were divided into those with IL-6R low expression, who were or were not subjected to any chemotherapy (34 cases), and those with IL-6R high expression who were subjected to chemotherapy (44 cases) and those with IL-6R high expression who were not subjected to chemotherapy (68 cases).