Annals of Oncology 6:789-794, 1995
© 1995 European Society for Medical Oncology
research-article |
Incidence and prognostic significance of t(14; 18) translocation in follicle center cell lymphoma of low and high grade
A report from southern Sweden
1Departments ofOncology
2Pathology
3Southern Swedish Regional Tumor Registry, University Hospital Lund, Sweden
4Correspondence to: Dr. Anna Johnson Department of Oncology University Hospital S-221 85 Lund Sweden
Background: The t(14; 18)(q21;q32) is the most common recurrent genetic defect in follicle center cell lymphoma (FCC). Conflicting reports exist in regard to a possible prognostic significance for the translocation
Patients and methods: In a single center, 102 patients with either low-grade (n=50) or high-grade (n=52) FCC (Kiel classification) and a median follow-up of 82 months were retrospectively studied to determine survival in relation to t(14; 18) as shown by either PCR of the bcl-2 rearrangement in paraffinized tissue or karyotype analysis
Results: t(14; 18) was detected in 30 of 50 (60%) low-grade FCC and in 12 of 52 (23%) high-grade FCC. The presence of the t(14; 18) was not related to morphologic bone marrow involvement or other clinical parameters, but it was related to age: in low-grade FCC, patients with t(14; 18) were an average of 17 years younger (p = 0.002) than those without the translocation In the group with high-grade histology, 30% survived beyond 60 months regardless of t(14;18) status (p = 0.92). Patients with low-grade histology and t(14; 18) fared better than those without, irrespective of age (p = 0.01). No significant difference in disease-free survival related to t(14;18) was found in either low- or high-grade FCC
Conclusions: The incidence of t(14; 18) is in accord with that of other European reports. T(14;18) does not define a prognostic subset of high-grade FCC, but is significantly correlated with a better survival in low-grade FCC. The association of t (14; 18) with younger age and indolent lymphoma is perplexing in light of recent findings of an age-related increase in t (14; 18) in normal subjects
bcl-2 rearrangement, follicle center cell lymphoma, histopathologic grade, prognosis, t(14; 18) translocation
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