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100 | 1 | _ | |a Glöss, Stefanie |0 P:(DE-He78)766063bc14996d73b7b17b5017c8fcba |b 0 |u dkfz |
245 | _ | _ | |a IDH2 R172 Mutations Across Poorly Differentiated Sinonasal Tract Malignancies: Forty Molecularly Homogenous and Histologically Variable Cases With Favorable Outcome. |
260 | _ | _ | |a [S.l.] |c 2021 |b Ovid |
336 | 7 | _ | |a article |2 DRIVER |
336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1642167948_13476 |2 PUB:(DE-HGF) |
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500 | _ | _ | |a 2021 Sep 1;45(9):1190-1204 |
520 | _ | _ | |a IDH2 R172 mutations occur in sinonasal undifferentiated carcinoma (SNUC), large-cell neuroendocrine carcinoma (LCNEC), sinonasal adenocarcinomas, and olfactory neuroblastoma (ONB). We performed a clinical, pathologic, and genetic/epigenetic analysis of a large IDH2-mutated sinonasal tumor cohort to explore their distinct features. A total 165 sinonasal/skull base tumors included 40 IDH2 mutants studied by light microscopy, immunohistochemistry, and genome-wide DNA methylation, and 125 IDH2 wild-type tumors used for comparison. Methylation profiles were analyzed by unsupervised hierarchical clustering, t-distributed stochastic neighbor embedding dimensionality reduction and assessed for copy number alterations (CNA). Thirty-nine histologically assessable cases included 25 (64.1%) SNUC, 8 (20.5%) LCNEC, 2 (5.1%) poorly differentiated adenocarcinomas, 1 (2.7%) ONB, and 3 (7.7%) IDH2-mutated tumors with ONB features. All cases were high-grade showing necrosis (82.4%), prominent nucleoli (88.9%), and median 21 mitoses/10 HPFs. AE1/AE3 and/or CAM 5.2 were positive in all and insulinoma-associated protein 1 (INSM1) in 80% cases. All IDH2 mutants formed one distinct group by t-distributed stochastic neighbor embedding dimensionality reduction separating from all IDH2 wild-type tumors. There was no correlation between methylation clusters and histopathologic diagnoses. Recurrent CNA included 1q gain (79.3%), 17p loss (75.9%), and 17q gain (58.6%). No CNA differences were observed between SNUC and LCNEC. IDH2 mutants showed better disease-specific survival than SMARCB1-deficient (P=0.027) and IDH2 wild-type carcinomas overall (P=0.042). IDH2-mutated sinonasal tumors are remarkably homogeneous at the molecular level and distinct from IDH2 wild-type sinonasal malignancies. Biology of IDH2-mutated sinonasal tumors might be primarily defined by their unique molecular fingerprint rather than by their respective histopathologic diagnoses. |
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700 | 1 | _ | |a Jurmeister, Philipp |b 1 |
700 | 1 | _ | |a Thieme, Anne |0 P:(DE-He78)21f693ba604e9286be3b25068b440d08 |b 2 |u dkfz |
700 | 1 | _ | |a Schmid, Simone |b 3 |
700 | 1 | _ | |a Cai, Wei Y |b 4 |
700 | 1 | _ | |a Serrette, Rene N |b 5 |
700 | 1 | _ | |a Perner, Sven |b 6 |
700 | 1 | _ | |a Ribbat-Idel, Julika |b 7 |
700 | 1 | _ | |a Pagenstecher, Axel |b 8 |
700 | 1 | _ | |a Bläker, Hendrik |b 9 |
700 | 1 | _ | |a Keber, Ursula |b 10 |
700 | 1 | _ | |a Stadelmann, Christine |b 11 |
700 | 1 | _ | |a Zechel, Sabrina |b 12 |
700 | 1 | _ | |a Johann, Pascal D |0 P:(DE-He78)3fdc3623477264cb5d0e14f256dbfbb8 |b 13 |u dkfz |
700 | 1 | _ | |a Hasselblatt, Martin |b 14 |
700 | 1 | _ | |a Paulus, Werner |b 15 |
700 | 1 | _ | |a Thomas, Christian |b 16 |
700 | 1 | _ | |a Dohmen, Hildegard |b 17 |
700 | 1 | _ | |a Baumhoer, Daniel |b 18 |
700 | 1 | _ | |a Frank, Stephan |b 19 |
700 | 1 | _ | |a Agaimy, Abbas |b 20 |
700 | 1 | _ | |a Schüller, Ulrich |b 21 |
700 | 1 | _ | |a Vasudevaraja, Varshini |b 22 |
700 | 1 | _ | |a Snuderl, Matija |b 23 |
700 | 1 | _ | |a Liu, Cheng Z |b 24 |
700 | 1 | _ | |a Pfister, David G |b 25 |
700 | 1 | _ | |a Jungbluth, Achim A |b 26 |
700 | 1 | _ | |a Ghossein, Ronald A |b 27 |
700 | 1 | _ | |a Xu, Bin |b 28 |
700 | 1 | _ | |a Capper, David |0 P:(DE-He78)51bf9ae9cb5771b30c483e5597ef606c |b 29 |u dkfz |
700 | 1 | _ | |a Dogan, Snjezana |b 30 |
773 | _ | _ | |a 10.1097/PAS.0000000000001697 |g Vol. Publish Ahead of Print |0 PERI:(DE-600)2029143-7 |n 9 |p 1190-1204 |t The American journal of surgical pathology |v 45 |y 2021 |x 0147-5185 |
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