HLA-C and neoplasm: Mechanisms employed by tumour cells to evade immune cells include: (1) the production of an immunosuppressive tumour microenvironment (TME; Labani‐Motlagh et al., 2020); (2) the avoidance of recognition by downregulating tumour antigens, Major histocompatibility complex (MHC) molecules and/or costimulatory molecules (Hicklin et al., 1999; Restifo et al., 1993); and (3) the expression of inhibitory molecules for immune cell suppression (Dong et al., 2002).