Second, arm-level gain of DLK2 gene reduced CD8+ T cells (*** p < 0.001), CD4+ T cells (** p < 0.01), macrophage (** p < 0.01), neutrophil (*** p < 0.001), and dendritic cell infiltrations (** p < 0.01) in tumor tissue. The gene discussed is CD4; the disease is neoplasm.