T-cell-rich B-cell lymphoma--a distinct clinicopathologic entity?

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• T-cell-rich B-cell lymphoma (TRBCL) is a subtype of large B-cell lymphoma.
• It is morphologically defined by neoplastic large B-cells amidst a dense T-lymphocyte background.
• Histiocytes may also be present.

Purpose of the Study:

• To discuss the morphological and immunophenotypical features of TRBCL.
• To explore the relationship between TRBCL and other lymphoma entities, particularly lymphocyte predominant Hodgkin's disease.
• To address the unsettled nosological position of TRBCL.

Main Methods:

• Morphological analysis of neoplastic B-cells.
• Immunophenotypical characterization (L26+, Leu-M1-, BerH2-).
• Literature review of growth patterns and relationships with other lymphomas.

Main Results:

• Neoplastic cells resemble large germinal center cells, including variants of Reed-Sternberg cells.
• TRBCL exhibits diverse growth patterns, leading to varied classifications in literature.
• Strong similarities and reported coexistence with lymphocyte predominant Hodgkin's disease suggest a potential developmental link.

Conclusions:

• The classification of TRBCL as a distinct entity is debated due to its heterogeneity.
• TRBCL shares significant similarities with lymphocyte predominant Hodgkin's disease.
• The precise nosological position of TRBCL requires further clarification.