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Cytogenetic evolution patterns in non-Hodgkin's lymphoma

B Johansson1, F Mertens, F Mitelman

  • 1Department of Clinical Genetics, University Hospital, Lund, Sweden.

Blood
|November 15, 1995
PubMed
Summary
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Secondary chromosomal aberrations in non-Hodgkin's lymphomas (NHL) are nonrandom and vary significantly based on primary abnormalities and B-cell versus T-cell origin. These findings offer insights into NHL pathogenesis and classification.

Area of Science:

  • Hematology
  • Cytogenetics
  • Oncology

Background:

  • Non-Hodgkin's lymphomas (NHL) are a heterogeneous group of lymphoid malignancies.
  • Chromosomal abnormalities are common in NHL and play a role in pathogenesis.
  • Understanding secondary aberrations in relation to primary abnormalities is crucial for NHL classification and prognosis.

Purpose of the Study:

  • To survey secondary chromosomal aberrations in NHL with specific primary abnormalities.
  • To correlate the type and frequency of secondary aberrations with primary abnormalities and NHL subtypes.
  • To identify recurrent secondary aberrations and their distribution patterns.

Main Methods:

  • Literature review of NHL cases with selected primary chromosomal abnormalities.
  • Analysis of 2,175 NHL cases with clonal karyotypic changes.

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  • Correlation of secondary aberrations with primary abnormality type, B-cell vs. T-cell origin, and morphologic grade (low, intermediate, high).

    • Main Results:

    • Of 908 NHLs with selected primary abnormalities, 670 (74%) had secondary aberrations.
    • Incidence and number of secondary aberrations varied significantly by primary abnormality, B-cell/T-cell origin, and grade.
    • Recurrent secondary aberrations were identified in 6 of 13 primary abnormality subgroups, with specific common imbalances noted (e.g., +X, -Y, dup(1q), del(6q)).

    Conclusions:

    • Secondary chromosomal aberrations in NHL exhibit nonrandom distribution patterns.
    • The frequency and type of secondary aberrations are significantly influenced by the primary chromosomal abnormality and NHL subtype.
    • These findings contribute to a deeper understanding of NHL genetic landscape and may aid in refining classification and therapeutic strategies.