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[Large B-cell lymphomas: variants and entities].

I Anagnostopoulos1, H Stein

  • 1Institut für Pathologie, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin.

Der Pathologe
|June 7, 2000
PubMed
Summary
This summary is machine-generated.

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Large B-cell lymphomas are aggressive and diverse, often presenting as primary nodal or extranodal disease. Recent classifications acknowledge their heterogeneity, distinguishing variants from distinct subtypes with unique characteristics.

Area of Science:

  • Hematology
  • Oncology
  • Pathology

Context:

  • Large B-cell neoplasms constitute a significant proportion (30-40%) of non-Hodgkin lymphomas.
  • These lymphomas exhibit aggressive clinical behavior and can arise de novo or secondary to less aggressive lymphomas.
  • Both nodal and extranodal presentations are common, with neoplastic cells showing considerable morphological variability.

Purpose:

  • To review the heterogeneity of large B-cell lymphomas.
  • To discuss the implications of this heterogeneity on classification systems, particularly the WHO classification.
  • To highlight the distinction between variants and distinct subtypes of large B-cell lymphomas.

Summary:

  • Large B-cell lymphomas are a heterogeneous group, with recent classifications acknowledging this by dividing them into variants and distinct subtypes.

Related Experiment Videos

  • Variants lack reproducible discriminating criteria, while certain subtypes like primary mediastinal and primary central nervous system lymphomas are recognized as distinct entities.
  • Newer types, including plasma-blastic and ALK-positive lymphomas, are under ongoing discussion regarding their classification.

    • Impact:

    • The updated classification aids in better understanding and diagnosing large B-cell lymphomas.
    • Recognizing distinct entities facilitates targeted research and potentially tailored therapeutic strategies.
    • This classification framework is crucial for advancing the study and management of these aggressive hematologic malignancies.