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  • Title: Chromosomal insertion involving MLL in childhood acute myeloblastic leukemia (M4).
    Author: Lafay-Cousin L, Soenen V, Mazingue F, Preudhomme C, Laï JL, Andrieux J.
    Journal: Cancer Genet Cytogenet; 2004 Apr 15; 150(2):153-5. PubMed ID: 15066323.
    Abstract:
    Recurrent chromosomal rearrangements involving the 11q23 region have been described in various hematologic malignancies. Among these rearrangements, translocations are the most common mechanism involving the mixed lineage leukemia gene (MLL). Few cases of insertion have been reported and, to our knowledge, none of them involved MLL and chromosome 1. We report a complex karyotype in a childhood acute myelomonocytic leukemia (AML M4) involving the 11q23 region with an insertion between chromosomes 1 and 11 in addition to a translocation between chromosomes 11 and 22. This translocation was clarified by fluorescence in situ hybridization (FISH) analysis: 46,XY,ins(1;11)(q22 approximately q23;q13q23),t(11;22)(q13;q11 approximately q12). This finding also underlines the complementary contribution of conventional cytogenetic and FISH analysis to detect karyotypic complex abnormalities.
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