In PAAD, the expression of YAP1 was significantly related to levels of B cells (R = 0.297, p = 7.95e−05), CD8+ T cells (R = 0.625, p = 6.21e−20), macrophages (R = 0.485, p = 1.71e−11), neutrophils (R = 0.461 p = 2.21e−10), and DCs (R = 0.493, p = 7.80e−12), whereas there were no correlations with CD4+ T cells and tumor purity (Figure 7A). This evidence concerns the gene CD4 and pancreatic adenocarcinoma.