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t(14;19)(q32;q13): A recurrent translocation in B-cell precursor acute lymphoblastic leukemia

✍ Scribed by Hazel M. Robinson; Kerry E. Taylor; G. Reza Jalali; Kan Luk Cheung; Christine J. Harrison; Anthony V. Moorman


Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
746 KB
Volume
39
Category
Article
ISSN
1045-2257

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✦ Synopsis


The recurrent t(14;19)(q32;q13) translocation associated with chronic B-cell lymphoproliferative disorders, such as atypical chronic lymphocytic leukemia, results in the juxtaposition of the IGH@ and BCL3 genes and subsequent overexpression of BCL3. We report six patients with B-cell precursor acute lymphoblastic leukemia who have a cytogenetically identical translocation with different breakpoints at the molecular level. Fluorescence in situ hybridization with locus-specific probes confirmed the involvement of the IGH@ gene but showed that the breakpoint on 19q13 lay outside the region documented in t(14;19)(q32;q13)-positive chronic lymphocytic leukemia. This newly described translocation constitutes a distinct cytogenetic subgroup that is confined to older children and younger adults with B-cell precursor acute lymphoblastic leukemia.


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