IFNG and neoplasm: One cause may be the use of different cell sources, tumour lines versus primary cells; two, use of IFN‐γ‐induced cell lines versus immunoproteasome‐deficient primary cells; three, study of immunopeptidomes associated with soluble versus membrane‐anchored MHC‐I molecules; and four, primary cells are but tumour cells transfected with monoallelic HLA‐I transgene are not under the control of IFN‐γ [47, 49, 96, 164, 191, 192, 193, 197, 203].