CD4 and pancreatic adenocarcinoma: And among them, only one gene, IFI30, was discovered both in CRA001160 and PAAD; 3 genes only occurred in PAAD; while 311 genes, such as well-known immune-related genes CD81, CD4 and HLA-A, were recalled in CRA001160 but not in PAAD (Fig. 3A).