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[Prolymphocytic leukemia associated with serum hypo IgA].

A Muraoka, M Ogura, K Miyamoto

    [Rinsho Ketsueki] the Japanese Journal of Clinical Hematology
    |October 1, 1989
    PubMed
    Summary

    This study reports a case of B-cell prolymphocytic leukemia (B-PLL) in a 69-year-old man, highlighting its similarities to B-cell chronic lymphocytic leukemia (B-CLL) in B cell function abnormalities.

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    Nihon yakurigaku zasshi. Folia pharmacologica Japonica·1997

    Area of Science:

    • Hematology
    • Immunology
    • Oncology

    Background:

    • Leukocytosis with atypical lymphoid cells and hepatosplenomegaly can indicate hematologic malignancies.
    • Distinguishing between B-cell chronic lymphocytic leukemia (B-CLL) and B-cell prolymphocytic leukemia (B-PLL) is crucial for prognosis and treatment.
    • B-cell malignancies often exhibit characteristic immunophenotypic and functional abnormalities.

    Observation:

    • A 69-year-old male presented with leukocytosis, atypical lymphoid cells, and significant hepatosplenomegaly.
    • Peripheral blood analysis revealed 76% lymphoid cells, and bone marrow showed 52.4% lymphoid cells.
    • Electron microscopy identified cells with specific nuclear and cytoplasmic features, including microvilli and limited mitochondria.

    Findings:

    • Immunophenotyping demonstrated positivity for Ia, B1, B2, C3R, with markedly elevated surface IgM-K and IgD-K.

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  • Serum immunoglobulin levels showed elevated IgG and IgM, but reduced IgA (53 mg/dl).
  • The patient was diagnosed with B-cell prolymphocytic leukemia (B-PLL) and treated with standard chemotherapy.

    • Implications:

    • The observed immunoglobulin abnormalities, particularly reduced IgA, suggest functional B-cell defects similar to those seen in B-CLL.
    • This case supports the hypothesis that B-PLL shares functional B-cell abnormalities with B-CLL.
    • Further research into B-cell dysfunction in B-PLL is warranted to refine diagnostic and therapeutic strategies.