Detection of HEY1-NCOA2 fusion by fluorescence in-situ hybridization in formalin-fixed paraffin-embedded tissues as a possible diagnostic tool for mesenchymal chondrosarcoma

Robert Nakayama, Yasuhiro Miura, Jiro Ogino, Michiro Susa, Itsuo Watanabe, Keisuke Horiuchi, Ukei Anazawa, Yoshiaki Toyama, Hideo Morioka, Makio Mukai, Tadashi Hasegawa

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Mesenchymal chondrosarcoma (MC) is an extremely rare subtype of chondrosarcoma. A tumor specific fusion gene, HEY1-NCOA2 fusion, was recently identified in this tumor. The finding raises the possibility that the diagnosis of MC can be improved by examining the fusion gene. In the present study, we aimed to evaluate the efficacy of fluorescence in situ hybridization (FISH) in detecting HEY1-NCOA2 fusion for the diagnosis of MC. Specimens from 10 patients diagnosed with MC were used for the study. Dual-color FISH was performed using two different probes that specifically hybridize to HEY1 and NCOA2, respectively. Fusion signals were identified in all but two specimens, in which no signal was detected, presumably because of inadequate sample preparation. In accordance with results of a previous study, FISH analysis was highly sensitive in detecting HEY1-NCOA2 fusion in adequately prepared MC samples. The current study adds further support for the use of HEY1-NCOA2 fusion as a valid diagnostic marker for MC.

Original languageEnglish
Pages (from-to)823-826
Number of pages4
JournalPathology international
Issue number12
Publication statusPublished - 2012 Dec 1



  • Fluorescence in situ hybridization
  • Fusion gene
  • Mesenchymal chondrosarcoma

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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