While TP53 mutations and copy loss were frequently identified in HGBCL, NOS and DLBCL subtypes, they co‐ocurred more frequently with PIM1 mutations in GCB‐DLBCL than in either HGBCL, NOS or ABC‐DLBCL(Figure 3C). Here, PIM1 is linked to diffuse large B-cell lymphoma.