PMID- 36555836 OWN - NLM STAT- MEDLINE DCOM- 20230105 LR - 20230418 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 23 IP - 24 DP - 2022 Dec 19 TI - Implementation of Copy Number Variations-Based Diagnostics in Morphologically Challenging EWSR1/FUS::NFATC2 Neoplasms of the Bone and Soft Tissue. LID - 10.3390/ijms232416196 [doi] LID - 16196 AB - In the last decade, new tumor entities have been described, including EWSR1/FUS::NFATC2-rearranged neoplasms of different biologic behavior. To gain further insights into the behavior of these tumors, we analyzed a spectrum of EWSR1/FUS::NFATC2-rearranged neoplasms and discuss their key diagnostic and molecular features in relation to their prognosis. We report five patients with EWSR1/FUS::NFATC2-rearranged neoplasms, including one simple bone cyst (SBC), two complex cystic bone lesions lacking morphological characteristics of SBC, and two sarcomas. In three cases, fluorescence in situ hybridization (FISH) and in all cases copy number variation (CNV) profiling and fusion analyses were performed. All patients were male, three cystic lesions occurred in children (aged 10, 14, and 17 years), and two sarcomas in adults (69 and 39 years). Fusion analysis revealed two FUS::NFATC2 rearrangements in two cystic lesions and three EWSR1::NFATC2 rearrangements in one complex cystic lesion and two sarcomas. EWSR1 FISH revealed tumor cells with break-apart signal without amplification in one complex cystic lesion and EWSR1 amplification in both sarcomas was documented. CNV analysis showed simple karyotypes in all cystic lesions, while more complex karyotypes were found in NFATC2-rearranged sarcomas. Our study supports and expands previously reported molecular findings of EWSR1/FUS::NFATC2-rearranged neoplasms. The study highlights the importance of combining radiology and morphologic features with molecular aberrations. The use of additional molecular methods, such as CNV and FISH in the routine diagnostic workup, can be crucial in providing a correct diagnosis and avoiding overtreatment. FAU - Brcic, Iva AU - Brcic I AUID- ORCID: 0000-0001-9847-0171 AD - Diagnostic and Research Institute of Pathology, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Scheipl, Susanne AU - Scheipl S AD - Department of Orthopedics and Trauma, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Bergovec, Marko AU - Bergovec M AD - Department of Orthopedics and Trauma, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Leithner, Andreas AU - Leithner A AUID- ORCID: 0000-0002-2598-2325 AD - Department of Orthopedics and Trauma, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Szkandera, Joanna AU - Szkandera J AD - Division of Clinical Oncology, Department of Medicine, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Sotlar, Karl AU - Sotlar K AD - Institute of Pathology, Paracelsus Medical University Salzburg, 5020 Salzburg, Austria. FAU - Suda, Arnold J AU - Suda AJ AD - Department of Orthopedics and Trauma Surgery, AUVA Trauma Center Salzburg, 5010 Salzburg, Austria. FAU - Smolle, Maria Anna AU - Smolle MA AUID- ORCID: 0000-0003-1021-0899 AD - Department of Orthopedics and Trauma, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Kraus, Tanja AU - Kraus T AD - Department of Orthopedics and Trauma, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Rosenberg, Andrew Eric AU - Rosenberg AE AD - Department of Pathology and Laboratory Medicine, University of Miami, Miami, FL 33136, USA. FAU - Liegl-Atzwanger, Bernadette AU - Liegl-Atzwanger B AUID- ORCID: 0000-0003-2229-5535 AD - Diagnostic and Research Institute of Pathology, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. FAU - Igrec, Jasminka AU - Igrec J AUID- ORCID: 0000-0003-0247-8393 AD - Division of General Radiology, Department of Radiology, Medical University of Graz, Comprehensive Cancer Centre, 8010 Graz, Austria. LA - eng PT - Journal Article DEP - 20221219 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (EWSR1 protein, human) RN - 0 (FUS protein, human) RN - 0 (NFATC Transcription Factors) RN - 0 (NFATC2 protein, human) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (RNA-Binding Protein EWS) RN - 0 (RNA-Binding Protein FUS) RN - 0 (Transcription Factors) SB - IM MH - Female MH - Humans MH - Male MH - *Bone Neoplasms/diagnosis/genetics/pathology MH - DNA Copy Number Variations MH - In Situ Hybridization, Fluorescence MH - NFATC Transcription Factors/genetics MH - Oncogene Proteins, Fusion/genetics MH - RNA-Binding Protein EWS/genetics MH - RNA-Binding Protein FUS/genetics MH - *Sarcoma/diagnosis/genetics MH - *Soft Tissue Neoplasms/diagnosis MH - Transcription Factors MH - Child MH - Adolescent MH - Adult MH - Aged PMC - PMC9784784 OTO - NOTNLM OT - EWSR1 OT - FUS OT - NFATC2 OT - alterations OT - copy number variations OT - sarcoma OT - simple bone cyst COIS- The authors declare no conflict of interest. EDAT- 2022/12/24 06:00 MHDA- 2022/12/27 06:00 PMCR- 2022/12/19 CRDT- 2022/12/23 01:36 PHST- 2022/10/18 00:00 [received] PHST- 2022/11/28 00:00 [revised] PHST- 2022/12/14 00:00 [accepted] PHST- 2022/12/23 01:36 [entrez] PHST- 2022/12/24 06:00 [pubmed] PHST- 2022/12/27 06:00 [medline] PHST- 2022/12/19 00:00 [pmc-release] AID - ijms232416196 [pii] AID - ijms-23-16196 [pii] AID - 10.3390/ijms232416196 [doi] PST - epublish SO - Int J Mol Sci. 2022 Dec 19;23(24):16196. doi: 10.3390/ijms232416196.