PMID- 27137987 OWN - NLM STAT- MEDLINE DCOM- 20170822 LR - 20181113 IS - 1532-8392 (Electronic) IS - 0046-8177 (Print) IS - 0046-8177 (Linking) VI - 55 DP - 2016 Sep TI - Biphenotypic sinonasal sarcoma: an expanded immunoprofile including consistent nuclear beta-catenin positivity and absence of SOX10 expression. PG - 44-50 LID - S0046-8177(16)30049-1 [pii] LID - 10.1016/j.humpath.2016.04.009 [doi] AB - Biphenotypic sinonasal sarcoma (BSNS) is a recently recognized low-grade sarcoma that exhibits both neural and myogenic differentiation. This unique dual phenotype stems from recurrent rearrangements in PAX3, a transcription factor that promotes commitment along both lineages. While identification of PAX3 rearrangements by fluorescence in situ hybridization (FISH) can confirm a BSNS diagnosis, this assay is not widely available. This study evaluates whether an expanded immunohistochemical panel can facilitate recognition of BSNS without molecular analysis. Eleven cases of BSNS were identified from the surgical pathology archives of two academic medical centers. In 8 cases, the diagnosis was confirmed by FISH using custom probes for PAX3. In 3 cases, FISH failed but histologic and immunophenotypic findings were diagnostic for BSNS. All 11 BSNS (100%) were at least focally positive for S100 as well as calponin and/or smooth muscle actin. In addition, 10 (91%) of 11 expressed nuclear beta-catenin, 8 (80%) of 10 expressed factor XIIIa, 4 (36%) of 11 expressed desmin, and 3 (30%) of 10 expressed myogenin. All 11 tumors were negative for SOX10. While no single marker resolves immunohistochemical overlap between BSNS and its histologic mimickers such as nerve sheath tumors, an extended immunohistochemical panel that includes beta-catenin and SOX10 helps to support the diagnosis of BSNS without the need for gene rearrangement studies. CI - Copyright (c) 2016 Elsevier Inc. All rights reserved. FAU - Rooper, Lisa M AU - Rooper LM AD - Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA. FAU - Huang, Shih-Chiang AU - Huang SC AD - Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. FAU - Antonescu, Cristina R AU - Antonescu CR AD - Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. FAU - Westra, William H AU - Westra WH AD - Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA; Department of Otolaryngology-Head and Neck Surgery, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA; Department of Oncology, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA. FAU - Bishop, Justin A AU - Bishop JA AD - Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA; Department of Otolaryngology-Head and Neck Surgery, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA; Department of Oncology, The Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA. Electronic address: jbishop@jhmi.edu. LA - eng GR - P30 CA008748/CA/NCI NIH HHS/United States GR - P50 DE019032/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Multicenter Study PT - Research Support, N.I.H., Extramural DEP - 20160429 PL - United States TA - Hum Pathol JT - Human pathology JID - 9421547 RN - 0 (Biomarkers, Tumor) RN - 0 (CTNNB1 protein, human) RN - 0 (MYOG protein, human) RN - 0 (Myogenin) RN - 0 (PAX3 Transcription Factor) RN - 0 (PAX3 protein, human) RN - 0 (SOX10 protein, human) RN - 0 (SOXE Transcription Factors) RN - 0 (beta Catenin) RN - EC 2.3.2.13 (Factor XIIIa) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Baltimore MH - Biomarkers, Tumor/*analysis/genetics MH - Cell Nucleus/*chemistry/immunology/pathology MH - Factor XIIIa/analysis MH - Female MH - Gene Rearrangement MH - Humans MH - Immunohistochemistry MH - Immunophenotyping/methods MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Myogenin/analysis MH - Nasal Cavity/*chemistry/immunology/pathology MH - Neoplasm Grading MH - Neoplasms, Complex and Mixed/*chemistry/genetics/immunology/pathology MH - New York City MH - PAX3 Transcription Factor/genetics MH - Paranasal Sinus Neoplasms/*chemistry/genetics/immunology/pathology MH - Phenotype MH - Predictive Value of Tests MH - SOXE Transcription Factors/*analysis MH - Sarcoma, Synovial/*chemistry/genetics/immunology/pathology MH - beta Catenin/*analysis PMC - PMC4981530 MID - NIHMS783079 OTO - NOTNLM OT - Biphenotypic sinonasal sarcoma OT - Immunohistochemistry OT - SOX10 OT - Sinonasal tract OT - beta-Catenin COIS- The authors have no conflicts of interest to declare. EDAT- 2016/05/04 06:00 MHDA- 2017/08/23 06:00 PMCR- 2017/09/01 CRDT- 2016/05/04 06:00 PHST- 2016/02/29 00:00 [received] PHST- 2016/04/01 00:00 [revised] PHST- 2016/04/15 00:00 [accepted] PHST- 2016/05/04 06:00 [entrez] PHST- 2016/05/04 06:00 [pubmed] PHST- 2017/08/23 06:00 [medline] PHST- 2017/09/01 00:00 [pmc-release] AID - S0046-8177(16)30049-1 [pii] AID - 10.1016/j.humpath.2016.04.009 [doi] PST - ppublish SO - Hum Pathol. 2016 Sep;55:44-50. doi: 10.1016/j.humpath.2016.04.009. Epub 2016 Apr 29.