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Unusual case of granular lymphocytes (GL) proliferation: simultaneous reactive and neoplastic proliferation

I Frydecka1, J Nowicka, B Slesak

  • 1Department of Hematology, Medical Academy of Wrocław.

Acta Haematologica Polonica
|January 1, 1992
PubMed

Insights

This study details a rare lymphoproliferative disorder of granular lymphocytes in a 55-year-old male. The condition involved malignant infiltrations and impaired NK cell function, leading to recurrent infections.

Area of Science:

  • Hematology
  • Immunology
  • Oncology

Background:

  • Lymphoproliferative disorders of granular lymphocytes (LPDGL) are rare conditions characterized by the clonal expansion of granular lymphocytes.
  • Understanding the clinical and pathological spectrum of LPDGL is crucial for accurate diagnosis and management.

Observation:

  • A 55-year-old male presented with a lymphoproliferative disease of granular lymphocytes.
  • During follow-up, reactive granular lymphocyte expansion occurred alongside malignant proliferation, particularly during infectious episodes.
  • Histopathology confirmed malignant lymphocytic infiltrations in the liver and gallbladder walls.

Findings:

  • Granular lymphocyte counts ranged from 1.1 G/l to 17.8 G/l.
  • Immunophenotyping revealed a CD3+, CD8+ surface phenotype.
  • Markedly reduced Natural Killer (NK) cell function was observed.
  • The patient experienced severe neutropenia (0.06 G/l - 0.8 G/l) and recurrent infections, despite a lack of severe parenchymal involvement.

Implications:

  • This case highlights the complex interplay between malignant proliferation, reactive changes, and immune dysfunction in LPDGL.
  • The findings underscore the importance of immunophenotyping and functional assays in diagnosing and characterizing LPDGL.
  • Further research into LPDGL pathogenesis and therapeutic strategies is warranted to improve patient outcomes.

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