IFNG and melanoma: TILs from patient GBM-A showed very strong IFN-γ responses to a mutated peptide and its corresponding wildtype counterpart from the preferentially expressed antigen in melanoma family member 4 (PRAMEF4) protein, which belongs to a group of previously described human melanoma-specific cytotoxic T-lymphocyte antigens with a potential role in retinoic acid signaling [12].