Abstract：
:The translocation (14;18)(q32;q21) is the hallmark of follicular lymphoma (FL). However, conventional cytogenetics and PCR techniques fail to detect it in at least 10% of cases. In order to evaluate the true incidence of this translocation in FL, we analyzed 63 patients with FL, and 17 patients with diffuse large cell lymphoma (DLCL) corresponding to suspected FL transformations using interphase fluorescence in situ hybridization (FISH). Colocalized signals related to the translocation were observed in 19-92% of cells (median = 51%), corresponding to positivity over the threshold in all (63/63) cases. Similarly, 16/17 possibly secondary DLCL displayed the translocation. Although some cytogenetic changes might be missed by this FISH assay (such as rare insertion, or translocations with other chromosomal partners), our results stress t(14;18)(q32;q21) as an almost constant finding in FL. Our sensitive interphase FISH assay should be of great value to define FL more accurately, namely in patients included into therapeutic trials. Furthermore, this approach could be of interest in (re)defining some types of FL, especially the grade 3 FL which frequently lack t(14;18).
journal_name
Leukemiajournal_title
Leukemiaauthors
Godon A,Moreau A,Talmant P,Baranger-Papot L,Geneviève F,Milpied N,Zandecki M,Avet-Loiseau Hdoi
10.1038/sj.leu.2402739subject
Has Abstractpub_date
2003-01-01 00:00:00pages
255-9issue
1eissn
0887-6924issn
1476-5551pii
2402739journal_volume
17pub_type
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