HLA-A and neoplasm: Components of the MHC-I complex (e.g., human leucocyte antigen HLA-A, -B, and -C) are expressed on nucleated cells and tumour cells, and components of the MHC-II complex (e.g., HLA-DR, -DP, and -DQ) are expressed on cells of the immune system (e.g., dendritic cells, macrophage, B cells) but can also be induced on some tumour cells or normal cell types in inflammatory conditions [517,518].