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Chromosome abnormalities in peripheral T-cell lymphoma.

S Lepretre¹, G Buchonnet, A Stamatoullas

¹Department of Hematology, Centre Henri Becquerel, Rouen, France.

Cancer Genetics and Cytogenetics

|March 4, 2000

Summary

Chromosomal abnormalities are common in peripheral T-cell lymphoma (PTCL), with frequent numerical and structural changes observed. However, these genetic findings did not correlate with specific subtypes or patient outcomes in this study.

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Area of Science:

Hematology
Cytogenetics
Oncology

Background:

Chromosomal abnormalities are well-documented in B-cell lymphomas but rarely studied in T-cell lymphomas.
Peripheral T-cell lymphoma (PTCL) encompasses diverse subtypes with varying clinical behaviors.

Purpose of the Study:

To investigate the spectrum of chromosomal abnormalities in untreated peripheral T-cell lymphoma (PTCL) patients.
To correlate cytogenetic findings with histological subtypes and clinical outcomes.

Main Methods:

A cytogenetic study was performed on 71 untreated PTCL patients classified using the REAL criteria.
Karyotyping was used to identify numerical and structural chromosomal aberrations.

Main Results:

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80.3% of patients exhibited abnormal clones; 12.7% had normal karyotypes.

Recurrent numerical abnormalities included trisomies 3, 5, 7, 8, 19, 21 and deletions -10, -13, -Y.

Frequent structural rearrangements involved chromosomes 1, 4, 6 (especially 6q deletions), 7, 9, and 14.

Conclusions:

Chromosomal abnormalities are prevalent in PTCL, with specific numerical and structural changes identified.
No significant correlation was found between cytogenetic findings and histological subgroups or clinical outcomes.
Further research is necessary to elucidate the role of these abnormalities in PTCL pathogenesis and classification.