CD4 and neoplasm: Next, we analysed tumour-infiltrating immune cell data and found that most of the infiltrating immune cells were abundant in Cluster 3, which included T cells (naive CD8+ T cells, effector memory CD8+ T cells, central memory CD8+ T cells, central memory CD4+ T cells, and effector memory CD4+ T cells), B cells (naive B cells, plasma B cells, class-switched memory B cells, and memory B cells), macrophages (M1 and M2), dendritic cells (activated myeloid dendritic cells and plasmacytoid dendritic cells), monocytes, mast cells, neutrophils and eosinophils (Fig. 3A).