Among B-cell lymphomas, the expression of PD-L1 is essentially confined to a subset of the clinically important activated B-cell (ABC)/non-germinal-center B (non-GCB) subtype of DLBCL, EBV-positive and -negative post-transplantation lymphoproliferative disorders, and EBV-associated DLBCL [16]. This evidence concerns the gene CD274 and diffuse large B-cell lymphoma.