NFKB1 and diffuse large B-cell lymphoma: GEP analysis of the pediatric non‐mBL cases, which expressed a GCB‐like signature versus pediatric mBL (Figure 5A), showed an expected reduced enrichment for BL‐related pathways (cell‐cycle‐MYC‐related), but displayed enrichment for signatures associated with IL‐6 signaling, DLBCL‐related stroma, KRAS, and NF‐κB (Figure 5B).