ICOS and neoplasm: Low expression of IL‐11 in tumour cells was associated with significantly higher levels of leukocytes (CD45), T cells (CD3, CD4, CD8), T‐cell activation (CD44, CD25, ICOS, Tim3), dendritic cell activation, antigen presentation (CD11c, CD80, B2M, HLA‐DR) and macrophage (CD68) markers (Figure 6F).