title: Molecular analysis of the t(2;14) translocation of childhood chronic lymphocytic leukemia.
abstract: Two rare cases of chronic lymphocytic leukemia (CLL) in children have been studied; both are associated with a previously undescribed chromosomal translocation [t(2;14) (p13;q32)]. In one patient the translocation was reciprocal and the breakpoint on chromosome 14 occurred just 5' of the C gamma 2 region on the productive immunoglobulin heavy-chain allele. The breakpoint on chromosome 2 does not involve the K locus but lies within an uncharacterized region that coincides with the position of a constitutive fragile site that occurs within normal lymphocytes. Data on the second patient are consistent with these findings and suggest that these cases represent a rare but distinct subgroup of CLL's with a specific cytogenetic change.
mesh_terms: D000483:Alleles; D002648:Child; D043283:Chromosome Fragile Sites; D002873:Chromosome Fragility; D002874:Chromosome Mapping; D002900:Chromosomes, Human, 1-3; D002901:Chromosomes, Human, 13-15; D006801:Humans; D007075:Immunoglobulin M / Q000235:genetics; D007945:Leukemia, Lymphoid / Q000235:genetics*; D011995:Recombination, Genetic; D014178:Translocation, Genetic
chemical_list: D007075:Immunoglobulin M