Gene partners of the EWSR1 fusion may represent molecularly distinct entities.

Transl Oncol

Department of Pharmacotherapy and Translational Research, The University of Florida, Jacksonville, FL, USA; Center for Pharmacogenomics and Translational Research, Nemours Children's Health, Jacksonville, Florida, USA. Electronic address:

Published: December 2023


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Article Abstract

EWSR1 fusions are highly promiscuous and are associated with unique malignancies, clinical phenotypes, and molecular subtypes. However, rare fusion partners (RFP) of EWSR1 has not been well described. Here, we conducted a cross-sectional, retrospective study of 1,140 unique tumors harboring EWSR1 fusions. We identified 64 unique fusion partners. RFPs were identified more often in adults than children. Alterations in cell cycle control and DNA damage response genes as driving the differences between fusion partners. Potentially clinically actionable genomic variants were more prevalent in tumors harboring RFP than common fusions. While the data presented here is limited, tumors harboring RFP of EWSR1 may represent molecularly distinct entities and may benefit from further molecular testing to identify targeted therapeutic options.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10593575PMC
http://dx.doi.org/10.1016/j.tranon.2023.101795DOI Listing

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