Cryptic insertion of 3'FOXO1 into inverted chromosome arm 2q in the presence of two normal chromosome 13s and 13 small interstitial duplications in a patient with alveolar rhabdomyosarcoma

Sarah Hackman, Laura Calvey, Kristen Bernreuter, Mengya Wang Mark, Sarah Starnes, Jacqueline R. Batanian

Research output: Contribution to journalArticle

Abstract

Alveolar rhabdomyosarcoma (ARMS) is a pediatric soft tissue neoplasm with a characteristic translocation, t(2;13)(q35;q14), which is detected in 70-80% of cases. This well-described translocation produces the gene fusion product PAX3-FOXO1. Cryptic rearrangements of this fusion have never before been reported in ARMS. Here we describe a patient with ARMS that showed, by fluorescence in situ hybridization and G-banded chromosomes, a cryptic insertion of 3'. FOXO1 into inverted chromosome 2q. The inversion breakpoints were depicted by array comparative genomic hybridization as two small interstitial duplications, one of which involved the PAX3 gene. In addition, the array comparative genomic hybridization results revealed 1q gain, 16q loss, and 11 more small duplications, with one of them involving the FOXO1 gene. Although the pathogenesis in classic ARMS cases is thought to be driven by the 5'. PAX3-3'. FOXO1 fusion on derivative chromosome 13, here we report a novel cryptic insertion of 3'. FOXO1 resulting in a pathogenic fusion with 5'. PAX3 on inverted chromosome 2q.

Original languageEnglish (US)
Pages (from-to)428-433
Number of pages6
JournalCancer Genetics
Volume208
Issue number9
DOIs
StatePublished - Sep 1 2015
Externally publishedYes

Keywords

  • 3'FOXO1
  • Alveolar rhabdomyosarcoma
  • Cryptic fusion

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

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