PMID- 34990868 OWN - NLM STAT- MEDLINE DCOM- 20220321 LR - 20220321 IS - 1618-0631 (Electronic) IS - 0344-0338 (Linking) VI - 230 DP - 2022 Feb TI - A group of sclerosing epithelioid fibrosarcomas with low-level amplified EWSR1-CREB3L1 fusion gene in children. PG - 153754 LID - S0344-0338(21)00415-5 [pii] LID - 10.1016/j.prp.2021.153754 [doi] AB - Sclerosing epithelioid fibrosarcoma (SEF), typically arising in middle-aged and older adults, is a rare malignant fibroblastic neoplasm characterized by epithelioid fibroblasts embedded in sclerotic hyalinized stroma. This tumor frequently harbors translocation between EWSR1 and CREB3 subfamily members. Here, we describe four cases of SEF with unique genetic characteristics in children. All tumors were located in the deep soft tissue of the trunk and celom. Histopathologically, the tumors were featured by prominent hyalinized sclerotic collagenous stroma within which relatively bland and monomorphic epithelioid cells were arranged in cords, nests, or sheets. Low-grade fibromyxoid sarcoma-like zones varied among cases. MUC4 was strong and diffuse. CD99 was positive. Transmission electron microscopy demonstrated spindle or polyhedral neoplastic cells with a collagen fiber-rich stroma. Interphase fluorescence in situ hybridization (FISH) revealed local amplification of the EWSR1 locus. Whole-genome sequencing indicated translocation between EWSR1 and CREB3L1 together with low-level amplification of the fusion parts. RT-PCR and Sanger sequencing confirmed the fusion transcript. Single nucleotide polymorphism and FISH analyses demonstrated co-deletion of 11p and 22q. The consistent genetic features indicated the presence of a unique molecular variant of SEF. DATA AVAILABILITY STATEMENT: The data used to support the findings of this study are available from the corresponding author upon request. CI - Copyright (c) 2022 Elsevier GmbH. All rights reserved. FAU - Zhang, Meng AU - Zhang M AD - Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - Yu, Yongbo AU - Yu Y AD - Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - Guan, Xiaoxing AU - Guan X AD - Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - Yao, Xingfeng AU - Yao X AD - Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - Jia, Chao AU - Jia C AD - Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - Hong, Enyu AU - Hong E AD - Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - Guo, Yongli AU - Guo Y AD - Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. FAU - He, Lejian AU - He L AD - Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health (NCCH), Beijing, China. Electronic address: lejianhe@sina.com. LA - eng PT - Case Reports PT - Journal Article DEP - 20211230 PL - Germany TA - Pathol Res Pract JT - Pathology, research and practice JID - 7806109 RN - 0 (Biomarkers, Tumor) RN - 0 (CREB3L1 protein, human) RN - 0 (Cyclic AMP Response Element-Binding Protein) RN - 0 (EWSR1 protein, human) RN - 0 (Nerve Tissue Proteins) RN - 0 (RNA-Binding Protein EWS) SB - IM MH - Biomarkers, Tumor/*genetics MH - Child MH - Child, Preschool MH - Cyclic AMP Response Element-Binding Protein/*genetics MH - Epithelioid Cells/ultrastructure MH - Female MH - Fibrosarcoma/*genetics/ultrastructure MH - *Gene Amplification MH - *Gene Fusion MH - Genetic Predisposition to Disease MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Nerve Tissue Proteins/*genetics MH - Phenotype MH - RNA-Binding Protein EWS/*genetics MH - Sclerosis MH - Soft Tissue Neoplasms/*genetics/ultrastructure MH - Whole Genome Sequencing OTO - NOTNLM OT - CREB3L1 OT - EWSR1 OT - Low-level amplification OT - Sclerosing epithelioid fibrosarcoma EDAT- 2022/01/07 06:00 MHDA- 2022/03/22 06:00 CRDT- 2022/01/06 20:16 PHST- 2021/07/04 00:00 [received] PHST- 2021/12/24 00:00 [revised] PHST- 2021/12/28 00:00 [accepted] PHST- 2022/01/07 06:00 [pubmed] PHST- 2022/03/22 06:00 [medline] PHST- 2022/01/06 20:16 [entrez] AID - S0344-0338(21)00415-5 [pii] AID - 10.1016/j.prp.2021.153754 [doi] PST - ppublish SO - Pathol Res Pract. 2022 Feb;230:153754. doi: 10.1016/j.prp.2021.153754. Epub 2021 Dec 30.