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[Persistent polyclonal B-cell lymphocytosis].

U Schönermarck1, H Diem, P Lohse

  • 1Schwerpunkt Nephrologie, Medizinische Klinik und Poliklinik I, Klinikum der udwig-Maximilians-Universität München, Munich.

Deutsche Medizinische Wochenschrift (1946)
|May 16, 2003
PubMed
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Persistent polyclonal B-cell lymphocytosis is a rare, benign condition characterized by specific lymphocyte and IgM findings. Early diagnosis is crucial to differentiate it from malignant lymphoproliferative diseases.

Area of Science:

  • Hematology
  • Immunology
  • Oncology

Background:

  • Persistent polyclonal B-cell lymphocytosis (PPBCL) is a rare, benign lymphoproliferative disorder.
  • It is characterized by a polyclonal expansion of B-cells, increased serum IgM, and the presence of binucleated lymphocytes.

Observation:

  • A 54-year-old woman presented with acute renal failure and arthralgias, later diagnosed with PPBCL.
  • Physical examination revealed palpable cervical lymph nodes.
  • Blood smear examination showed binucleated lymphocytes, and immunophenotyping confirmed polyclonal B-cell lymphocytosis.

Findings:

  • Serum IgM levels were polyclonal elevated.
  • PCR analysis identified a t(14;18) translocation (bcl-2/IgH rearrangement).
  • The diagnosis of PPBCL was established despite normal leukocyte and lymphocyte counts.

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Implications:

  • PPBCL follows an indolent course and does not require chemotherapy.
  • Accurate differentiation from malignant lymphoproliferative diseases is essential for appropriate patient management.
  • This case highlights key diagnostic markers for PPBCL.