Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10897604 | Cancer Genetics | 2015 | 6 Pages |
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 3â²FOXO1 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 5â²PAX3-3â²FOXO1 fusion on derivative chromosome 13, here we report a novel cryptic insertion of 3â²FOXO1 resulting in a pathogenic fusion with 5â²PAX3 on inverted chromosome 2q.
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Authors
Sarah Hackman, Laura Calvey, Kristen Bernreuter, Mengya Wang Mark, Sarah Starnes, Jacqueline R. Batanian,