BCL6 and diffuse large B-cell lymphoma: Of note, the combination of CD10, MUM1, and BCL‐6 can divide DLBCL in germinal center (GCB‐DLBCL) and activated B center (ABC) DLBCL with about 80% concordance with the gene expression profile.7 However, the lack of standardization of various IHC algorithms for DLBCL cell of origin classification renders them inappropriate as reliable methods used for clinical decision making.8