001     167356
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024 7 _ |a 10.1186/s40478-021-01118-5
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082 _ _ |a 610
100 1 _ |a Korshunov, Andrey
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245 _ _ |a Molecular analysis of pediatric CNS-PNET revealed nosologic heterogeneity and potent diagnostic markers for CNS neuroblastoma with FOXR2-activation.
260 _ _ |a London
|c 2021
|b Biomed Central
336 7 _ |a article
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520 _ _ |a Primitive neuroectodermal tumors of the central nervous system (CNS-PNETs) are highly malignant neoplasms posing diagnostic challenge due to a lack of defining molecular markers. CNS neuroblastoma with forkhead box R2 (FOXR2) activation (CNS_NBL) emerged as a distinct pediatric brain tumor entity from a pool previously diagnosed as primitive neuroectodermal tumors of the central nervous system (CNS-PNETs). Current standard of identifying CNS_NBL relies on molecular analysis. We set out to establish immunohistochemical markers allowing safely distinguishing CNS_NBL from morphological mimics. To this aim we analyzed a series of 84 brain tumors institutionally diagnosed as CNS-PNET. As expected, epigenetic analysis revealed different methylation groups corresponding to the (1) CNS-NBL (24%), (2) glioblastoma IDH wild-type subclass H3.3 G34 (26%), (3) glioblastoma IDH wild-type subclass MYCN (21%) and (4) ependymoma with RELA_C11orf95 fusion (29%) entities. Transcriptome analysis of this series revealed a set of differentially expressed genes distinguishing CNS_NBL from its mimics. Based on RNA-sequencing data we established SOX10 and ANKRD55 expression as genes discriminating CNS_NBL from other tumors exhibiting CNS-PNET. Immunohistochemical detection of combined expression of SOX10 and ANKRD55 clearly identifies CNS_NBL discriminating them to other hemispheric CNS neoplasms harboring 'PNET-like' microscopic appearance. Owing the rarity of CNS_NBL, a confirmation of the elaborated diagnostic IHC algorithm will be necessary in prospective patient series.
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650 _ 7 |a CNS-PNET
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650 _ 7 |a FOXR2-activation
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650 _ 7 |a Neuroblastoma
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650 _ 7 |a SOX10
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700 1 _ |a Okonechnikov, Konstantin
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700 1 _ |a Schmitt-Hoffner, Felix
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700 1 _ |a Ryzhova, Marina
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700 1 _ |a Sahm, Felix
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700 1 _ |a Stichel, Damian
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700 1 _ |a Schrimpf, Daniel
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700 1 _ |a Reuss, David E
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700 1 _ |a Sievers, Philipp
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700 1 _ |a Suwala, Abigail Kora
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700 1 _ |a Kumirova, Ella
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700 1 _ |a Zheludkova, Olga
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700 1 _ |a Golanov, Andrey
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700 1 _ |a Jones, David T W
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700 1 _ |a Pfister, Stefan M
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700 1 _ |a Kool, Marcel
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700 1 _ |a von Deimling, Andreas
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773 _ _ |a 10.1186/s40478-021-01118-5
|g Vol. 9, no. 1, p. 20
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