CTLA4 and cholangiocarcinoma: Furthermore, we found that IFIT1 was positively correlated with immune checkpoint gens such as PDCD1, CD274, CTLA4, TIGIT, LAG3, HAVCR2, and Programmed Cell Death 1 Ligand 2 (PDCD1LG2) in cancers other than Mesothelioma (MESO), Liver hepatocellular carcinoma (LIHC), Kidney renal papillary cell carcinoma (KIRP), KIRC, Cholangiocarcinoma (CHOL), and Adrenocortical carcinoma (ACC) (Fig. S16K).