ICAM1 and cholangiocarcinoma: In our previous study [9], using bioinformatics search for classically secreted proteins from the secretome data of four CCA cell lines, including KKU-OCA17, KKU-213, KKU-214, and KKU-100, we identified intercellular adhesion molecule 1 (ICAM-1) as a potential prognostic marker for CCA.