Diagnostic Algorithm of Common Mature B-Cell Lymphomas by Immunohistochemistry

Insights

Immunohistochemistry aids mature B-cell lymphoma diagnosis, but CD5 and CD10 markers lack specificity. A comprehensive panel of B-cell antigens is crucial for accurate identification of lymphomas and plasma cell neoplasms.

Area of Science:

  • Hematopathology
  • Oncology
  • Immunohistochemistry

Background:

  • Mature B-cell lymphomas and plasma cell neoplasms have distinct immunohistochemical profiles for diagnosis.
  • However, many B-cell lymphomas share overlapping immunohistochemical features, reducing diagnostic specificity.
  • Specific markers like cyclin D1 for mantle cell lymphoma exist but are rare.

Purpose of the Study:

  • To review CD5 and CD10 expression in mature B-cell lymphomas.
  • To analyze immunophenotypes of plasma cells in myeloma and lymphoma.
  • To examine rare aggressive B-cell lymphomas with plasma cell antigen features.

Main Methods:

  • Systematic review of published English literature.
  • Literature search conducted via PubMed indexing.

Main Results:

  • CD5 and CD10 expression is useful but not specific for B-cell lymphoma subtypes.
  • Plasma cells in neoplasia and lymphoma show overlapping yet distinct immunophenotypes.
  • CD138 is consistently positive in aggressive B-cell lymphomas with plasmablastic features.

Conclusions:

  • Include CD5 and CD10 in initial lymphoma panels but use other B-cell antigens judiciously.
  • A panel including CD19, CD45, CD56, and CD117 aids plasma cell identification.
  • Aggressive B-cell lymphomas with plasmablastic features often show CD138 positivity.
Abstract

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