Cribriform neuroepithelial tumor: Molecular characterization of a SMARCB1-deficient non-rhabdoid tumor with favorable long-term outcome
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Cribriform neuroepithelial tumor: Molecular characterization of a SMARCB1-deficient non-rhabdoid tumor with favorable long-term outcome. / Johann, Pascal D; Hovestadt, Volker; Thomas, Christian; Jeibmann, Astrid; Heß, Katharina; Bens, Susanne; Oyen, Florian; Hawkins, Cynthia; Pierson, Christopher R; Aldape, Kenneth; Kim, Sang-Pyo; Widing, Eva; Sumerauer, David; Hauser, Péter; van Landeghem, Frank; Ryzhova, Marina; Korshunov, Andrey; Capper, David; Jones, David T W; Pfister, Stefan M; Schneppenheim, Reinhard; Siebert, Reiner; Paulus, Werner; Frühwald, Michael C; Kool, Marcel; Hasselblatt, Martin.
In: BRAIN PATHOL, Vol. 27, No. 4, 07.2017, p. 411-418.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Cribriform neuroepithelial tumor: Molecular characterization of a SMARCB1-deficient non-rhabdoid tumor with favorable long-term outcome
AU - Johann, Pascal D
AU - Hovestadt, Volker
AU - Thomas, Christian
AU - Jeibmann, Astrid
AU - Heß, Katharina
AU - Bens, Susanne
AU - Oyen, Florian
AU - Hawkins, Cynthia
AU - Pierson, Christopher R
AU - Aldape, Kenneth
AU - Kim, Sang-Pyo
AU - Widing, Eva
AU - Sumerauer, David
AU - Hauser, Péter
AU - van Landeghem, Frank
AU - Ryzhova, Marina
AU - Korshunov, Andrey
AU - Capper, David
AU - Jones, David T W
AU - Pfister, Stefan M
AU - Schneppenheim, Reinhard
AU - Siebert, Reiner
AU - Paulus, Werner
AU - Frühwald, Michael C
AU - Kool, Marcel
AU - Hasselblatt, Martin
N1 - © 2016 International Society of Neuropathology.
PY - 2017/7
Y1 - 2017/7
N2 - 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.
AB - 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.
U2 - 10.1111/bpa.12413
DO - 10.1111/bpa.12413
M3 - SCORING: Journal article
C2 - 27380723
VL - 27
SP - 411
EP - 418
JO - BRAIN PATHOL
JF - BRAIN PATHOL
SN - 1015-6305
IS - 4
ER -