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Prognostic subgroups in B-cell chronic lymphocytic leukemia defined by specific chromosomal abnormalities.
G Juliusson1, D G Oscier, M Fitchett
1Department of Medicine, Karolinska Institute, Huddinge Hospital, Sweden.
The New England Journal of Medicine
|September 13, 1990
Summary
Chromosomal abnormalities impact survival in B-cell chronic lymphocytic leukemia (CLL). Karyotype analysis offers prognostic insights beyond clinical data for CLL patients.
Area of Science:
- Hematology
- Cytogenetics
- Oncology
Background:
- Chromosomal abnormalities are known prognostic factors in acute leukemia.
- Their role in B-cell chronic lymphocytic leukemia (CLL) prognosis remains debated.
Purpose of the Study:
- To investigate the prognostic value of chromosomal abnormalities in B-cell CLL.
- To correlate specific chromosomal defects with patient survival outcomes.
Main Methods:
- Cytogenetic analysis of banded metaphases from 433 B-cell CLL patients across five European centers.
- Culturing of blood mononuclear cells with B-cell mitogens.
Main Results:
- 218 out of 391 evaluable patients exhibited clonal chromosomal changes.
- Trisomy 12 and abnormalities of chromosomes 13q and 14q were most frequent.
- Patients with normal karyotypes had >15 years median survival vs. 7.7 years for those with clonal changes.
- Complex karyotypes and specific abnormalities (e.g., 14q, trisomy 12) were associated with poorer survival.
- High percentage of metaphases with abnormalities correlated with poor survival.
Conclusions:
- Chromosomal analysis is a valuable prognostic tool in B-cell CLL.
- Karyotype findings provide additional prognostic information beyond established clinical data.
- Identified prognostic variables include age, sex, chromosomal abnormality percentage, and Binet stage.