The correlation analysis between an abundance of CD3-positive, tumor-infiltrating lymphocytes and the expression levels of the five SAGs causing the enrichment of the KEGG pathway antigen processing and presentation (CD74, TAP2, PSME1, HLA-DRA, and HLA-E) revealed a significant and positive Pearson’s product–moment correlation in each case. This evidence concerns the gene PSME1 and neoplasm.