Loss of heterozygosity at 7q31 in breast cancer: Results from an international collaborative study group

P. Devilee, J. Hermans, J. Eyfjörd, A. L. Børresen, R. Lidereau, H. Sobol, Å Borg, A. M. Cleton-Jansen, E. Oláh, B. B. Cohen, S. Scherneck, U. Hamann, B. Peterlin, M. Caligo, Y. J. Bignon, Ch Maugard, T. I. Andersen, A. E.M. Ødegand, I. Bièche, D. BirnbaumC. J. Cornelisse, M. Sztán, M. Steel, S. Seitz, N. Logar, R. Gulouh, C. Ghimenti, S. Bruelle, M. P. Joalland

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Loss of heterozygosity (LOH) at 7q31 has been claimed to occur in over 80% of all breast cancers and to be of prognostic significance. This would make this genetic alteration the most common event observed in breast cancer to date. Others, however, have been unable to confirm this high incidence. In this multicenter study, we have compiled LOH scorings for three polymorphic markers for 7q31-q32 in 683 breast tumors. Although some significant differences between centers existed, no center reported more than 40% LOH, and the average rate was 19%. Disease-free and overall survival of the patients whose tumors carried LOH at 7q31 did not differ significantly from those patients whose tumors showed retention of heterozygosity at 7q31. In a double-blind scoring of a subset of the raw data, an average discordant rate of LOH scoring of 12% was observed. While startling in itself, this was unable to explain the variation among centers, nor the difference with the initially reported high rate of LOH. We conclude that LOH at 7q31 is not important as a genetic alteration in breast cancer as originally suggested, nor a strong determinant of disease outcome.

Original languageEnglish
Pages (from-to)193-199
Number of pages7
JournalGenes Chromosomes and Cancer
Volume18
Issue number3
Publication statusPublished - Mar 1997

ASJC Scopus subject areas

  • Genetics
  • Cancer Research

Fingerprint Dive into the research topics of 'Loss of heterozygosity at 7q31 in breast cancer: Results from an international collaborative study group'. Together they form a unique fingerprint.

  • Cite this

    Devilee, P., Hermans, J., Eyfjörd, J., Børresen, A. L., Lidereau, R., Sobol, H., Borg, Å., Cleton-Jansen, A. M., Oláh, E., Cohen, B. B., Scherneck, S., Hamann, U., Peterlin, B., Caligo, M., Bignon, Y. J., Maugard, C., Andersen, T. I., Ødegand, A. E. M., Bièche, I., ... Joalland, M. P. (1997). Loss of heterozygosity at 7q31 in breast cancer: Results from an international collaborative study group. Genes Chromosomes and Cancer, 18(3), 193-199.