ICAM1 and cholangiocarcinoma: To correlate our findings with CCA clinical data, we compared ICAM1 mRNA expression levels with human CCA tumors and normal bile duct tissues by querying the UALCAN: The University of ALabama at Birmingham CANcer data analysis Portal (http://ualcan.path.uab.edu/)21,22, using the database of The Cancer Genome Atlas Program (TCGA).