In order to further analyze the association between ceRNA risk scores and immune checkpoint genes, we first compared differential expression of the eight immune checkpoint genes (CD274, CTLA4, HAVCR2, LAG3, PDCD1, PDCD1LG2, SIGLEC15, and TIGIT) in PAAD samples and normal samples. Here, HAVCR2 is linked to pancreatic adenocarcinoma.