Furthermore, in BRCA, CHOL, CLL, CRC (COADREAD), GBM, HNSC, KIRC, LIHC, MCC, NHL, NSCLC, PAAD, SCC, SKCM, UCEC, and UVM, both CD47 and TNFRSF9 were co-expressed on CD8 + exhausted T cells. Here, TNFRSF9 is linked to Merkel cell skin cancer.