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Plasmacytoid CD8 lymphoma: morphologic and immunologic characterization

L Amiot1, P Tas, S Caulet-Maugendre

  • 1Laboratoire d'Hématologie-Immunologie, CHRU, Rennes, France.

Acta Haematologica
|January 1, 1995
PubMed
Summary
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This study details a rare T-cell lymphoma presenting with plasmacytoid features. Immunophenotypic analysis confirmed abnormal T-cell proliferation, crucial for diagnosing this lymphoma.

Area of Science:

  • Hematology
  • Immunology
  • Oncology

Background:

  • Lymphadenopathy and fever are common symptoms requiring differential diagnosis.
  • Plasmacytoid morphology in lymph node biopsies can present diagnostic challenges.

Observation:

  • A 79-year-old female presented with fever and lymphadenopathy.
  • Lymph node biopsy revealed diffuse infiltration by medium-sized cells with plasmacytoid features.

Findings:

  • Immunophenotyping demonstrated suppressor T-cell antigen (CD2, CD3, CD7, CD8) expression.
  • Absence of CD5 expression and clonal T-cell receptor gamma gene rearrangement confirmed abnormal T-cell proliferation.
  • Immunoglobulin heavy-chain gene rearrangement was absent, ruling out B-cell lineage.

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Implications:

  • Accurate immunophenotypic analysis is essential for diagnosing T-cell lymphomas with unusual morphology.
  • This case highlights the importance of immunological studies in differentiating T-cell lymphomas from B-cell neoplasms.
  • Understanding aberrant T-cell antigen expression aids in classifying rare hematologic malignancies.