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[LGL lymphoma]

K Suzuki1, S Tagawa, K Koh

  • 1Department of Clinical Hematology, Osaka University Medical School.

Rinsho Byori. the Japanese Journal of Clinical Pathology
|October 1, 1996
PubMed
Summary
This summary is machine-generated.

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This study examines two large granular lymphocytic lymphoma (LGL lymphoma) cases. Findings suggest that malignant NK-LGL cells can express cytoplasmic CD3 and UCHL1, highlighting the importance of May-Grünwald-Giemsa staining for diagnosis.

Area of Science:

  • Hematology
  • Oncology
  • Immunology

Background:

  • Large granular lymphocytic (LGL) lymphoma is a rare hematologic malignancy.
  • Distinguishing between T-cell and NK-cell lineage in LGL lymphoma can be challenging.
  • Understanding the immunophenotype of LGL lymphoma is crucial for accurate diagnosis and treatment.

Observation:

  • Two patients with LGL lymphoma were analyzed, including one with LGL leukemia/lymphoma and another with NK-LGL lymphoma.
  • TCR delta gene rearrangement confirmed clonality in the LGL leukemia/lymphoma patient.
  • Cytochemical analysis of NK-LGL lymphoma cells revealed positive staining for anti-CD45RO (UCHL-1) and anti-CD3 monoclonal antibodies.

Findings:

  • Malignant NK-LGL cells can exhibit cytoplasmic CD3 positivity and UCHL1 reactivity.

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  • These findings challenge traditional lineage classifications in some LGL lymphoma cases.
  • May-Grünwald-Giemsa staining of biopsied specimens is essential for diagnosing LGL lymphoma.

    • Implications:

    • The study expands the understanding of immunophenotypic variability in LGL lymphoma.
    • Accurate lineage determination is critical for prognostication and therapeutic strategies.
    • Diagnostic protocols for LGL lymphoma should incorporate detailed cytochemical and immunophenotypic analyses.