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Barrans, S.L. et al.

Barrans, O'Connor, Evans, Davies, Owen, Haynes, Morgan, Jack,

Rearrangement of the BCL6 locus at 3q27 is an independent poor prognostic factor in nodal diffuse large B-cell lymphoma.

Diffuse large B-cell lymphomas (DLBCL) are a heterogeneous group of tumours, varying in clinical features, immunophenotype and cytogenetics. The aim of this study was to investigate the prognostic significance of BCL6 gene rearrangement at the 3q27 locus in patients with primary nodal disease, and to examine interrelationships with immunophenotype and International Prognostic Index (IPI). We have developed a fluorescent in situ hybridization (FISH)-based technique for the retrospective analysis of the effect of BCL6 gene rearrangements on survival, using nuclei extracted from paraffin-embedded tissue. FISH results were obtained in 111 presentation cases of nodal DLBCL. The IPI was calculated and each case was stained immunocytochemically for BCL6, BCL2 and CD10. 3q27 rearrangements were detected in 25% of cases. BCL2 protein and a germinal centre (GC) phenotype (defined as CD10+, BCL6+) were expressed in 56% and 41% of cases respectively. In multivariate analysis, rearrangement of 3q27 and BCL2 expression and the absence of a GC phenotype were associated with a poor prognosis. These factors can be used in conjunction with the IPI to improve risk stratification in nodal DLBCL.[1]

References

Rearrangement of the BCL6 locus at 3q27 is an independent poor prognostic factor in nodal diffuse large B-cell lymphoma. Barrans, S.L., O'Connor, S.J., Evans, P.A., Davies, F.E., Owen, R.G., Haynes, A.P., Morgan, G.J., Jack, A.S. Br. J. Haematol. (2002) [Pubmed]

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