As a most recent study found that the gene expression profile of DLBCL with 9p24 amplification was similar to those of PMBCL48, we compared the 15 PMBCL cases with 15 DLBCL–NOS cases with PD-L1/PD-L2 amplifications (almost exclusively ABC-subtype)46. This evidence concerns the gene PDCD1LG2 and diffuse large B-cell lymphoma.