Though NKG2A is constitutively expressed as a dimer with CD94 on a majority of mature natural killer (NK) cells, CD8 T cells require TCR‐mediated activation before NKG2A/CD94 is displayed and frequencies of NKG2A+ CD8 T cells are increased in tumor tissues.14, 18, 20. This evidence concerns the gene KLRC1 and neoplasm.