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Nonrandom chromosome abnormalities in lymphoma.

C D Bloomfield, D C Arthur, G Frizzera

    Cancer Research
    |June 1, 1983
    PubMed
    Summary
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    Malignant lymphomas frequently exhibit clonal chromosome abnormalities, particularly in B-cell lymphomas. Specific chromosomal alterations correlate with lymphoma subtypes and histology, suggesting their diagnostic and prognostic importance.

    Area of Science:

    • Cytogenetics
    • Hematopathology
    • Oncology

    Background:

    • Malignant lymphomas are a heterogeneous group of cancers originating from lymphocytes.
    • Understanding the genetic basis of lymphomas is crucial for diagnosis, prognosis, and targeted therapy.

    Purpose of the Study:

    • To investigate the spectrum and frequency of chromosomal abnormalities in malignant lymphomas.
    • To correlate these cytogenetic findings with histological subtypes and immunological phenotypes.

    Main Methods:

    • G-banded chromosome analysis was performed on lymph node or tumor samples from 94 patients with malignant lymphoma.
    • Statistical analysis was used to correlate chromosomal abnormalities with clinical and pathological features.

    Main Results:

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    • Clonal chromosome abnormalities were detected in 91% of patients, including all B-cell lymphomas.
    • Recurrent numerical abnormalities included gains of chromosomes 12, 18, 7, and 21.
    • Frequent structural abnormalities involved regions 14q, 18q, 6q, 1p, and 8q, with specific translocations like t(14;18) and t(8;14) identified.
    • Certain abnormalities, such as t(14;18) and del(6)(q21), showed significant associations with specific histological subtypes (e.g., follicular, large cell).

    Conclusions:

    • Essentially all lymphomas harbor cytogenetic abnormalities.
    • These abnormalities are significantly associated with specific histologies and, in some cases, immunological phenotypes.
    • Further research is warranted to elucidate the functional significance of these chromosomal alterations, potentially involving oncogenes.