TY  - JOUR
AU  - Hasselblatt, Martin
AU  - Thomas, Christian
AU  - Federico, Aniello
AU  - Nemes, Karolina
AU  - Johann, Pascal D
AU  - Bison, Brigitte
AU  - Bens, Susanne
AU  - Dahlum, Sonja
AU  - Kordes, Uwe
AU  - Redlich, Antje
AU  - Lessel, Lienhard
AU  - Pajtler, Kristian W
AU  - Mawrin, Christian
AU  - Schüller, Ulrich
AU  - Nolte, Kay
AU  - Kramm, Christof M
AU  - Hinz, Felix
AU  - Sahm, Felix
AU  - Giannini, Caterina
AU  - Penkert, Judith
AU  - Kratz, Christian P
AU  - Pfister, Stefan M
AU  - Siebert, Reiner
AU  - Paulus, Werner
AU  - Kool, Marcel
AU  - Frühwald, Michael C
TI  - SMARCB1-deficient and SMARCA4-deficient Malignant Brain Tumors With Complex Copy Number Alterations andTP53Mutations May Represent the First Clinical Manifestation of Li-Fraumeni Syndrome.
JO  - The American journal of surgical pathology
VL  - 46
IS  - 9
SN  - 0147-5185
CY  - [S.l.]
PB  - Ovid
M1  - DKFZ-2022-00779
SP  - 1277-1283
PY  - 2022
N1  - 2022 Sep 1;46(9):1277-1283
AB  - Atypical teratoid/rhabdoid tumor (AT/RT) is a malignant central nervous system tumor predominantly affecting infants. Mutations ofSMARCB1or (rarely)SMARCA4causing loss of nuclear SMARCB1 or SMARCA4 protein expression are characteristic features, but further recurrent genetic alterations are lacking. Most AT/RTs occur de novo, but secondary AT/RTs arising from other central nervous system tumors have been reported. Malignant gliomas, IDH wild-type, arising in patients with Li-Fraumeni syndrome typically show somatic mutations ofTP53as well as complex copy number alterations, but little is known about the loss of SMARCB1 or SMARCA4 protein expression in this context. Here, we report 2 children in whom malignant supratentorial brain tumors with SMARCB1 deficiency, complex copy number alterations, and somaticTP53mutations lead to the discovery of pathogenic/likely pathogenicTP53variants in the germline. Screening of the molecularneuropathology.org dataset for cases with similar genetic and epigenetic alterations yielded another case with SMARCA4 deficiency in a young adult with Li-Fraumeni syndrome. In conclusion, SMARCB1-deficient or SMARCA4-deficient malignant brain tumors with complex copy number alterations and somaticTP53mutations in children and young adults may represent the first clinical manifestation of Li-Fraumeni syndrome and should prompt genetic counseling and investigation forTP53germline status.
LB  - PUB:(DE-HGF)16
C6  - pmid:35446794
DO  - DOI:10.1097/PAS.0000000000001905
UR  - https://inrepo02.dkfz.de/record/179601
ER  -