Conventional follicular lymphoma, Grade 3B (FL3B), or follicular LBCL, needs to be distinguished from LBCL, IRF4+, too, due to the similar morphological findings and a frequent IRF4/MUM1‐positive phenotype, but conventional FL3B occurs more commonly in adults, and lacks the IRF4 translocation.23 This evidence concerns the gene IRF4 and follicular lymphoma.