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Persistent polyclonal B-cell lymphocytosis.

L Ide1, A Dekoninck, E Verburgh

  • 1Department of Haematology, Laboratory Medicine, University Hospital Gasthuisberg, Leuven, Belgium. Nancy.Boeckx@uz.kuleuven.ac.be

Acta Clinica Belgica
|May 23, 2002
PubMed
Summary
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Persistent polyclonal B-cell lymphocytosis (PPBL) is a rare syndrome. This case highlights a patient with PPBL, featuring atypical lymphocytes, elevated IgM, and a history of EBV infection, with no signs of malignancy.

Area of Science:

  • Hematology
  • Immunology
  • Oncology

Background:

  • Persistent polyclonal B-cell lymphocytosis (PPBL) is a rare non-malignant lymphoproliferative disorder.
  • It is characterized by sustained peripheral blood lymphocytosis with specific morphological features.

Observation:

  • The case involved a patient with serological evidence of prior Epstein-Barr virus (EBV) infection.
  • The patient presented with elevated polyclonal serum IgM levels.
  • Heavy smoking history was noted in the patient.

Findings:

  • Circulating atypical binucleated lymphocytes were a key finding.
  • Diagnostic workup excluded any underlying B-cell malignancy.
  • The lymphocytosis was polyclonal, indicating a reactive process.

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Implications:

  • This case contributes to understanding the clinical spectrum of PPBL.
  • It underscores the importance of differentiating PPBL from lymphoproliferative malignancies.
  • Further research may elucidate the role of EBV and environmental factors in PPBL pathogenesis.