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037 _ _ |a DKFZ-2017-01324
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082 _ _ |a 610
100 1 _ |a Johann, Pascal
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245 _ _ |a Cribriform neuroepithelial tumor: molecular characterization of a SMARCB1-deficient non-rhabdoid tumor with favorable long-term outcome.
260 _ _ |a Oxford
|c 2017
|b Wiley-Blackwell
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520 _ _ |a Rhabdoid phenotype and loss of SMARCB1 expression in a brain tumor are characteristic features of atypical teratoid/rhabdoid tumors (ATRT). Rare non-rhabdoid brain tumors showing cribriform growth pattern and SMARCB1 loss have been designated cribriform neuroepithelial tumor (CRINET). Small case series suggest that CRINETs may have a relatively favorable prognosis. However, the long-term outcome is unclear and it remains uncertain whether CRINET represents a distinct entity or a variant of ATRT. Therefore, 10 CRINETs were clinically and molecularly characterized and compared with 10 ATRTs of each of three recently described molecular subgroups (i.e. ATRT-TYR, ATRT-SHH and ATRT-MYC) using Illumina Infinium HumanMethylation450 arrays, FISH, MLPA, and sequencing. Furthermore, outcome was compared to a larger cohort of 27 children with ATRT-TYR. Median age of the 6 boys and 4 girls harboring a CRINET was 20 months. On histopathological examination, all CRINETs demonstrated a cribriform growth pattern and distinct tyrosinase staining. On unsupervised cluster analysis of methylation data, all CRINETs examined exclusively clustered within the ATRT-TYR molecular subgroup. As ATRT-TYR, CRINETs mainly showed large heterozygous 22q deletions (9/10) and SMARCB1 mutations of the other allele. In two patients, SMARCB1 mutations were also present in the germline. Estimated mean overall survival in patients with CRINETs was 125 months (95% confidence interval 100-151 months) as compared to only 53 (33-74) months in patients with ATRTs of the ATRT-TYR subgroup (Log-Rank P < 0.05). In conclusion, CRINET represents a SMARCB1-deficient non-rhabdoid tumor, which shares molecular similarities with the ATRT-TYR subgroup but has distinct histopathological features and favorable long-term outcome.
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700 1 _ |a Hovestadt, Volker
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700 1 _ |a Thomas, Christian
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700 1 _ |a Jeibmann, Astrid
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700 1 _ |a Heß, Katharina
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700 1 _ |a Bens, Susanne
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700 1 _ |a Oyen, Florian
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700 1 _ |a Hawkins, Cynthia
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700 1 _ |a Pierson, Christopher R
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700 1 _ |a Aldape, Kenneth
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700 1 _ |a Kim, Sang-Pyo
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700 1 _ |a Widing, Eva
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700 1 _ |a Sumerauer, David
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700 1 _ |a Hauser, Péter
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700 1 _ |a van Landeghem, Frank
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700 1 _ |a Ryzhova, Marina
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700 1 _ |a Korshunov, Andrey
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700 1 _ |a Capper, David
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700 1 _ |a Jones, David
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700 1 _ |a Pfister, Stefan
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700 1 _ |a Schneppenheim, Reinhard
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700 1 _ |a Siebert, Reiner
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700 1 _ |a Paulus, Werner
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700 1 _ |a Frühwald, Michael C
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700 1 _ |a Kool, Marcel
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700 1 _ |a Hasselblatt, Martin
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