PMID- 37738543 OWN - NLM STAT- MEDLINE DCOM- 20230925 LR - 20240214 IS - 2473-4284 (Electronic) IS - 2473-4284 (Linking) VI - 7 DP - 2023 Sep TI - Loss of Chromosome 3q Is a Prognostic Marker in Fusion-Negative Rhabdomyosarcoma. PG - e2300037 LID - 10.1200/PO.23.00037 [doi] LID - e2300037 AB - PURPOSE: Soft tissue sarcomas (STS) are rare mesenchymal neoplasms that frequently show complex chromosomal aberrations such as amplifications or deletions of DNA sequences or even whole chromosomes. We recently found that gain of chromosome (chr) 8 is associated with worse overall survival (OS) in STS as a group. We therefore aimed to investigate the overall copy number profile of rhabdomyosarcoma (RMS) to evaluate for prognostic signatures. METHODS: Fluorescence in situ hybridization (FISH) testing was performed on a cohort of STS to assess for chr8 gain. Copy number variation (CNV) data from the National Cancer Institute were analyzed to assess for prognostically significant CNV aberrations in FOXO1 fusion-negative (FN)- versus fusion-positive (FP)-RMS. FISH testing was performed on a cohort of FN-RMS to assess for chr3q loss and correlate with outcomes. RESULTS: Chr8 gain is a highly prevalent CNV in embryonal RMS and shows slightly improved prognosis. Meanwhile, loss of chr3q was associated with worse outcome in FN-RMS compared with FP-RMS. CONCLUSION: The pathogenesis of STS including FN-RMS remains poorly understood, emphasizing the need for new therapeutic advances and adequate risk stratification. Our data demonstrate that loss of chr3q is associated with poor OS in FN-RMS, supporting it as an important tool for risk stratification. FAU - Dehner, Carina A AU - Dehner CA AUID- ORCID: 0000-0001-5214-4813 AD - Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO. AD - Department of Pathology/Dermatopathology, Indiana University, Indianapolis, IN. FAU - Bell, Robert C AU - Bell RC AUID- ORCID: 0000-0003-0427-2567 AD - Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO. AD - Department of Pathology, University of Michigan, Ann Arbor, MI. FAU - Cao, Yang AU - Cao Y AD - Division of Oncology, Washington University School of Medicine, St Louis, MO. FAU - He, Kevin AU - He K AUID- ORCID: 0000-0003-2642-7830 AD - Division of Oncology, Washington University School of Medicine, St Louis, MO. FAU - Chrisinger, John S A AU - Chrisinger JSA AUID- ORCID: 0000-0002-7138-0923 AD - Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO. FAU - Armstrong, Amy E AU - Armstrong AE AUID- ORCID: 0000-0002-7784-0476 AD - Division of Pediatric Hematology/Oncology, Washington University School of Medicine, St Louis, MO. FAU - Yohe, Marielle AU - Yohe M AUID- ORCID: 0000-0001-5356-9426 AD - Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD. FAU - Shern, Jack AU - Shern J AUID- ORCID: 0000-0001-5579-7625 AD - Center for Cancer Research, National Cancer Institute, Bethesda, MD. FAU - Hirbe, Angela C AU - Hirbe AC AUID- ORCID: 0000-0003-1719-0771 AD - Division of Oncology, Washington University School of Medicine, St Louis, MO. LA - eng GR - C5066/A10399/CRUK_/Cancer Research UK/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - JCO Precis Oncol JT - JCO precision oncology JID - 101705370 SB - IM MH - Humans MH - *DNA Copy Number Variations MH - In Situ Hybridization, Fluorescence MH - Prognosis MH - *Rhabdomyosarcoma/diagnosis/genetics MH - Chromosomes PMC - PMC10861018 COIS- The following represents disclosure information provided by authors of this manuscript. All relationships are considered compensated unless otherwise noted. Relationships are self-held unless noted. I = Immediate Family Member, Inst = My Institution. Relationships may not relate to the subject matter of this manuscript. For more information about ASCO's conflict of interest policy, please refer to www.asco.org/rwc or ascopubs.org/po/author-center. Open Payments is a public database containing information reported by companies about payments made to US-licensed physicians (Open Payments). EDAT- 2023/09/22 18:42 MHDA- 2023/09/25 06:42 PMCR- 2023/09/22 CRDT- 2023/09/22 16:03 PHST- 2023/09/25 06:42 [medline] PHST- 2023/09/22 18:42 [pubmed] PHST- 2023/09/22 16:03 [entrez] PHST- 2023/09/22 00:00 [pmc-release] AID - PO.23.00037 [pii] AID - 10.1200/PO.23.00037 [doi] PST - ppublish SO - JCO Precis Oncol. 2023 Sep;7:e2300037. doi: 10.1200/PO.23.00037.