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The high-grade B-cell lymphomas: double hit and more
1School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.
Blood
|October 20, 2024
Summary
New classifications refine high-grade B-cell lymphoma (HGBL) diagnosis, clarifying MYC/BCL2 biology and prognosis. Advances in therapy, including immunotherapy, offer improved outcomes for patients with HGBL.
Area of Science:
- Hematology
- Oncology
- Genetics
Background:
- Recent classifications (WHO 2022, ICC) have updated the approach to high-grade B-cell lymphoma (HGBL).
- MYC and BCL2/BCL6 rearrangements are key genetic drivers, influencing prognosis and treatment strategies.
- Understanding the biology of these rearrangements is crucial for accurate diagnosis and patient management.
Purpose of the Study:
- To review current data on the biology, prognosis, and therapies for high-grade B-cell lymphoma (HGBL).
- To discuss the impact of new classifications on HGBL diagnosis and management.
- To highlight advancements in therapeutic approaches for HGBL.
Main Methods:
- Review of current literature and classifications (WHO 2022, ICC).
- Analysis of biological insights into MYC/BCL2 and MYC/BCL6 rearrangements.
- Synthesis of data on prognostic factors and therapeutic outcomes in HGBL.
Main Results:
- MYC/BCL2 rearranged HGBL has a distinct biology and poorer prognosis.
- MYC/BCL6 translocations present biological heterogeneity, challenging unified classification.
- Fluorescent in situ hybridization (FISH) is now standard for detecting these rearrangements.
- Therapy intensification and immunotherapy, including CAR T-cell therapy, show promise for refractory HGBL.
Conclusions:
- Current classifications provide a refined framework for HGBL diagnosis.
- The biological heterogeneity of certain genetic subtypes necessitates careful consideration.
- Advances in targeted therapies and immunotherapy are improving outcomes for HGBL patients.
- HGBL (not otherwise specified) remains a diagnostic challenge requiring further research.
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