Our analysis confirmed that the infiltration rate of CD8+ T cells of patients with kidney renal papillary cell carcinoma (KIRP) and pancreatic adenocarcinoma (PAAD) was higher, and their survival was considerably poorer than that of patients with a lower CD8+ T cell infiltration rate (P<0.05; Figure 4D and F). Here, CD8A is linked to pancreatic adenocarcinoma.