Diffuse large B-cell lymphoma (DLBCL) can undergo stepwise immunophenotypic and molecular evolution over decades, progressing from a germinal Center B-cell-like (GCB)-like phenotype to an activated B-cell -like/non-GCB pattern (MUM1+, CD30+) and ultimately to an aggressive anaplastic variant.The cell-of-origin profile and its associated molecular features are not necessarily static; thus, therapeutic strategies for relapsed DLBCL should be tailored to the current disease state rather than relying on the signature at initial diagnosis.Longitudinal re-evaluation through repeat biopsies is imperative to capture the evolving landscape of the malignancy, ensuring that treatment selection is guided by the most recent pathological and molecular findings.
Yamanaka et al. (2026) studied this question.