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Cordier F, Van der Meulen J, Van Gaever B, Lapeire L, Sys G, Van Dorpe J, Creytens D. Undifferentiated sarcoma of bone with a round to epithelioid cell phenotype harboring a novel EWSR1-SSX2 fusion identified by RNA-based next-generation sequencing. Genes Chromosomes Cancer 2021; 61:44-49. [PMID: 34538011 DOI: 10.1002/gcc.22999] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/31/2021] [Accepted: 09/14/2021] [Indexed: 11/09/2022] Open
Abstract
Due to the increased application of RNA-based next-generation sequencing techniques on bone and soft tissue round cell sarcomas new fusions are frequently found, thereby expanding the molecular landscape of these tumors. In this report, we describe and discuss the finding of an undifferentiated sarcoma of the bone with a round to epithelioid cell phenotype harboring a novel EWSR1-SSX2 fusion. Treatment of this new bone tumor entity according to the Euro Ewing 2012 protocol led to complete pathologic response.
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Affiliation(s)
- Fleur Cordier
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Joni Van der Meulen
- Molecular Diagnostics Ghent University Hospital (MDG), Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Bram Van Gaever
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Lore Lapeire
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium.,Department of Medical Oncology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Gwen Sys
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium.,Department of Traumatology and Orthopaedics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - David Creytens
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
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