KLRB1 and cancer: For paired tumour and normal tissues in TCGA pan-cancer, CD161 was expressed at low levels in BRCA, COAD, HNSC, LIHC, LUAD, LUSC, THCA, UCEC, and BLCA (Figures 3A–I), while it was highly expressed in KIRC and PCPG (Figures 3J, K).