PMID- 24441665 OWN - NLM STAT- MEDLINE DCOM- 20140626 LR - 20171116 IS - 1532-0979 (Electronic) IS - 0147-5185 (Linking) VI - 38 IP - 6 DP - 2014 Jun TI - Recurrent EWSR1-CREB3L1 gene fusions in sclerosing epithelioid fibrosarcoma. PG - 801-8 LID - 10.1097/PAS.0000000000000158 [doi] AB - Sclerosing epithelioid fibrosarcoma (SEF) and low-grade fibromyxoid sarcoma (LGFMS) are 2 distinct types of sarcoma, with a subset of cases showing overlapping morphologic and immunohistochemical features. LGFMS is characterized by expression of the MUC4 protein, and about 90% of cases display a distinctive FUS-CREB3L2 gene fusion. In addition, SEF is often MUC4 positive, but is genetically less well studied. Fluorescence in situ hybridization (FISH) studies have shown involvement of the FUS gene in the majority of so-called hybrid LGFMS/SEF and in 10% to 25% of sarcomas with pure SEF morphology. In this study, we investigated a series of 10 primary tumors showing pure SEF morphology, 4 cases of LGFMS that at local or distant relapse showed predominant SEF morphology, and 1 primary hybrid LGFMS/SEF. All but 1 case showed diffuse expression for MUC4. Using FISH, reverse transcription polymerase chain reaction, and/or mRNA sequencing in selected cases, we found recurrent EWSR1-CREB3L1 fusion transcripts by reverse transcription polymerase chain reaction in 3/10 pure SEF cases and splits and deletions of the EWSR1 and/or CREB3L1 genes by FISH in 6 additional cases. All 5 cases of LGFMS with progression to SEF morphology or hybrid features had FUS-CREB3L2 fusion transcripts. Our results indicate that EWSR1 and CREB3L1 rearrangements are predominant over FUS and CREB3L2 rearrangements in pure SEF, highlighting that SEF and LGFMS are different tumor types, with different impacts on patient outcome. FAU - Arbajian, Elsa AU - Arbajian E AD - *Department of Clinical Genetics, University and Regional Laboratories, Skane University Hospital, Lund University, Lund, Sweden daggerDepartment of Musculoskeletal Pathology and Orthopaedic Oncology, Royal Orthopaedic Hospital NHS Foundation Trust and Division of Cancer Studies, Medical School, University of Birmingham, Birmingham double daggerDepartment of Histopathology, Royal Marsden Hospital, London, UK. FAU - Puls, Florian AU - Puls F FAU - Magnusson, Linda AU - Magnusson L FAU - Thway, Khin AU - Thway K FAU - Fisher, Cyril AU - Fisher C FAU - Sumathi, Vaiyapuri P AU - Sumathi VP FAU - Tayebwa, Johnbosco AU - Tayebwa J FAU - Nord, Karolin H AU - Nord KH FAU - Kindblom, Lars-Gunnar AU - Kindblom LG FAU - Mertens, Fredrik AU - Mertens F LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Surg Pathol JT - The American journal of surgical pathology JID - 7707904 RN - 0 (Biomarkers, Tumor) RN - 0 (CREB3L1 protein, human) RN - 0 (Calmodulin-Binding Proteins) RN - 0 (Cyclic AMP Response Element-Binding Protein) RN - 0 (EWSR1 protein, human) RN - 0 (MUC4 protein, human) RN - 0 (Mucin-4) RN - 0 (Nerve Tissue Proteins) RN - 0 (RNA, Messenger) RN - 0 (RNA-Binding Protein EWS) RN - 0 (RNA-Binding Protein FUS) RN - 0 (RNA-Binding Proteins) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Biomarkers, Tumor/analysis/*genetics MH - Calmodulin-Binding Proteins/*genetics MH - Cyclic AMP Response Element-Binding Protein/*genetics MH - *Epithelioid Cells/chemistry/pathology MH - Female MH - Fibroma/chemistry/*genetics/pathology MH - Fibrosarcoma/chemistry/*genetics/secondary MH - *Gene Fusion MH - Gene Rearrangement MH - Genetic Predisposition to Disease MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Mucin-4/analysis MH - Neoplasm Grading MH - Neoplasm Recurrence, Local MH - Nerve Tissue Proteins/*genetics MH - Phenotype MH - RNA, Messenger/analysis MH - RNA-Binding Protein EWS MH - RNA-Binding Protein FUS/genetics MH - RNA-Binding Proteins/*genetics MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sclerosis MH - Sequence Analysis, RNA MH - Soft Tissue Neoplasms/chemistry/*genetics/pathology MH - Young Adult EDAT- 2014/01/21 06:00 MHDA- 2014/06/27 06:00 CRDT- 2014/01/21 06:00 PHST- 2014/01/21 06:00 [entrez] PHST- 2014/01/21 06:00 [pubmed] PHST- 2014/06/27 06:00 [medline] AID - 10.1097/PAS.0000000000000158 [doi] PST - ppublish SO - Am J Surg Pathol. 2014 Jun;38(6):801-8. doi: 10.1097/PAS.0000000000000158.