Using the TIMER database, we found out that the relationship between BGN expression and TIICs was significantly related to B cells, CD8+ T cells, CD4+ T cells, macrophages, neutrophils, and dendritic cells in multiple cancer types, such as BLCA, BRCA, COAD, ESCA, HNSC, KICH, LGG, LIHC, LUAD, LUSC, OV, PAAD, PCPG, PRAD, READ, SKCM, and STAD (Figure 7(a)). This evidence concerns the gene CD4 and cancer.