1. Segmental chromosomal alterations have prognostic impact in neuroblastoma: a report from the INRG project.
- Author
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Schleiermacher, G., Mosseri, V., London, W. B., Maris, J. M., Brodeur, G. M., Attiyeh, E., Haber, M., Khan, J., Nakagawara, A., Speleman, F., Noguera, R., Tonini, G. P., Fischer, M., Ambros, I., Monclair, T., Matthay, K. K., Ambros, P., Cohn, S. L., and Pearson, A. D. J.
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NEUROBLASTOMA , *CHROMOSOME abnormalities , *GENE amplification , *DATABASES , *DELETION mutation , *CANCER patients , *GENETIC markers - Abstract
Background:In the INRG dataset, the hypothesis that any segmental chromosomal alteration might be of prognostic impact in neuroblastoma without MYCN amplification (MNA) was tested.Methods:The presence of any segmental chromosomal alteration (chromosome 1p deletion, 11q deletion and/or chromosome 17q gain) defined a segmental genomic profile. Only tumours with a confirmed unaltered status for all three chromosome arms were considered as having no segmental chromosomal alterations.Results:Among the 8800 patients in the INRG database, a genomic type could be attributed for 505 patients without MNA: 397 cases had a segmental genomic type, whereas 108 cases had an absence of any segmental alteration. A segmental genomic type was more frequent in patients >18 months and in stage 4 disease (P<0.0001). In univariate analysis, 11q deletion, 17q gain and a segmental genomic type were associated with a poorer event-free survival (EFS) (P<0.0001, P=0.0002 and P<0.0001, respectively). In multivariate analysis modelling EFS, the parameters age, stage and a segmental genomic type were retained in the model, whereas the individual genetic markers were not (P<0.0001 and RR=2.56; P=0.0002 and RR=1.8; P=0.01 and RR=1.7, respectively).Conclusion:A segmental genomic profile, rather than the single genetic markers, adds prognostic information to the clinical markers age and stage in neuroblastoma patients without MNA, underlining the importance of pangenomic studies. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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