Within a single-cell tumor immune transcriptomic (scRNAseq) dataset covering different tumor types, GPR56 mRNA expression was detected in various tumor-infiltrating immune cell sub-types, specifically in regulatory T cells, T helper cells, Th 17 cells, proliferative T cells, cytotoxic CD8 T cells, terminally exhausted CD8 T cells and NK cells (Figure 1A,B). This evidence concerns the gene CD8A and neoplasm.