An Unconventional Presentation of Multiple Myeloma: Bazex Syndrome

In conclusion, IRF4 gene analysis should be considered in patients of any age with Waldeyer's ring LBCL with germinal center origin, follicular and/or diffuse pattern, and strong MUM1 expression on pathological examination.The presence of IRF4 rearrangement may affect the prognosis of the disease and the duration of chemotherapy.