To analyze the relationship between HNRNPA2B1 expression and immune cell infiltration in the tumor immune microenvironment, we evaluated the infiltration scores of B cells, CD4+ T cells, CD8+ T cells, neutrophil, macrophage, and DC in each patient in each tumor according to the expression of HNRNPA2B1 using TIMER analysis, and finally we observed that the expression of this gene was significantly related to the immune infiltration in 37 cancer species (Figure 5(a)). The gene discussed is CD4; the disease is neoplasm.