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Blood, 21 May 2009, Vol. 113, No. 21, pp. 5090-5093.
Prepublished online as a Blood First Edition Paper on March 16, 2009; DOI 10.1182/blood-2008-12-194704.
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Submitted December 15, 2008
Accepted March 6, 2009
The favorable impact of CEBPA mutations in patients with acute myeloid leukemia (AML) is only observed in the absence of associated cytogenetic abnormalities and FLT3 internal duplication (FLT3-ITD)
Aline Renneville, Nicolas Boissel, Nathalie Gachard, Dina Naguib, Christian Bastard, Stephane de Botton, Olivier Nibourel, Cecile Pautas, Oumedaly Reman, Xavier Thomas, Claude Gardin, Christine Terre, Sylvie Castaigne, Claude Preudhomme, and Herve Dombret*
Department of Hematology, Hopital Claude Huriez, Lille, France
Department of Hematology, Hopital Saint-Louis, AP-HP and EA3518 University Paris 7, Paris, France
Department of Hematology, Centre Hospitalier Universitaire Dupuytren, Limoges, France
Department of Hematology, Centre Hospitalier Universitaire, Caen, France
Department of Hematology, Centre Henri Becquerel, Rouen, France
Department of Hematology, Institut Gustave Roussy, Villejuif, France
Department of Hematology, Hopital Henri Mondor, AP-HP, Creteil, France
Department of Hematology, Hopital Edouard Herriot, Lyon, France
Department of Hematology, Hopital Avicenne, AP-HP, Bobigny, France
Department of Hematology, Hopital Mignot, Versailles, France
* Corresponding author; email: herve.dombret{at}sls.aphp.fr.
Mutations of the CEBPA gene have been associated with a favorable outcome in patients with AML, but mainly in those with a normal karyotype. Here, we analyzed the impact of associated cytogenetic abnormalities or bad-prognosis FLT3-ITD in 53 patients with CEBPA+ de novo AML treated in the ALFA trials. We found that only those with a normal karyotype and no FLT3-ITD displayed the expected favorable outcome. In this context, relapse-free, disease-free, and overall survival were significantly longer than in corresponding patients without CEBPA mutation (P=0.035, 0.016, and 0.047 respectively). This was not observed in the context of an abnormal karyotype or associated FLT3-ITD. Furthermore, after adjustment on age, trial, and mutation type, these features were independently predictive of shorter overall survival in the subset of patients with CEBPA+ AML (multivariate hazard ratio=2.7 [95% CI, 1.08-6.7] and 2.9 [95% CI, 1.01-8.2] with P=0.034 and 0.05, for abnormal karyotype and FLT3-ITD, respectively).

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