HLA-DRB1 and neoplasm: Signature gene analysis of IFN‐Mac_CXCL9 revealed 108 significantly up‐regulated genes in tumour‐infiltrating cells including HLA‐A, HLA‐DRB1 and interferon‐regulated genes (CXCL9, CXCL10 and IL4I1) (Figures 3B and S7A and Table S4).