Fluorescence in situ hybridization analysis of 110 hematopoietic disorders with chromosome 5 abnormalities: do de novo and therapy-related myelodysplastic syndrome-acute myeloid leukemia actually differ?
Fiche publication
Date publication
juillet 2007
Auteurs
Membres identifiés du Cancéropôle Est :
Dr CORNILLET-LEFEBVRE Pascale
Tous les auteurs :
Lessard M, Helias C, Struski S, Perrusson N, Uettwiller F, Mozziconacci MJ, Lafage-Pochitaloff M, Dastugue N, Terre C, Brizard F, Cornillet-Lefebvre P, Mugneret F, Barin C, Herry A, Luquet I, Desangles F, Michaux L, Verellen-Dumoulin C, Perrot C, Van den Akker J, Lespinasse J, Eclache V, Berger R
Lien Pubmed
Résumé
A retrospective cytogenetic study of acute myeloid leukemias (AML) and myelodysplastic syndromes (MDS) was conducted by the Groupe Francophone de Cytogenetique Hematologique (GFCH) to evaluate the structural abnormalities of chromosome 5 associated with other chromosomal abnormalities, in particular of chromosome 7, in these pathologies. In all, 110 cases of AML/MDS were recruited based on the presence of chromosome 5 abnormalities under conventional cytogenetics and supplemented by a systematic fluorescence in situ hybridization study of chromosomes 5 and 7. The abnormalities of the long arm of chromosome 5 (5q) were deletions of various sizes and sometimes cryptic. The 5q abnormalities were associated with translocations in 54% of cases and were simple deletions in 46%. In 68% of cases, 5q deletions were associated with chromosome 7 abnormalities, and 90% of these presented a complex karyotype. Of the 110 patients, 28 had a hematopoietic disorder secondary to chemotherapy, radiotherapy, or both. Among 82 patients with de novo AML/MDS, 63 were older than 60 years. Chromosomal abnormalities often associated hypodiploidy and chromosome 5 and 7 abnormalities in complex karyotypes, features resembling those of secondary hemopathies. Systematic investigation of the exposure to mutagens and oncogenes is thus essential to specify the factors potentially involved in MDS/AML with 5q abnormalities.
Référence
Cancer Genet Cytogenet. 2007 Jul 1;176(1):1-21.