CD4 and cancer: Among different cancers, HOTAIR CNV is linked to the infiltrating level of different types of immune cells: B cells, CD8+ T cells, CD4+ T cells, macrophages, neutrophils and dendritic cells in the BRCA, B cells and neutrophils in COAD, B cells, CD4+ T cells, macrophages and dendritic cells in the LUAD and B cells, CD4+ T cells, neutrophils and dendritic cells in the PAAD.