SMARCB1-deficient and SMARCA4-deficient Malignant Brain Tumors With Complex Copy Number Alterations and TP53 Mutations May Represent the First Clinical Manifestation of Li-Fraumeni Syndrome
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SMARCB1-deficient and SMARCA4-deficient Malignant Brain Tumors With Complex Copy Number Alterations and TP53 Mutations May Represent the First Clinical Manifestation of Li-Fraumeni Syndrome. / Hasselblatt, Martin; Thomas, Christian; Federico, Aniello; Nemes, Karolina; Johann, Pascal D; Bison, Brigitte; Bens, Susanne; Dahlum, Sonja; Kordes, Uwe; Redlich, Antje; Lessel, Lienhard; Pajtler, Kristian W; Mawrin, Christian; Schüller, Ulrich; Nolte, Kay; Kramm, Christof M; Hinz, Felix; Sahm, Felix; Giannini, Caterina; Penkert, Judith; Kratz, Christian P; Pfister, Stefan M; Siebert, Reiner; Paulus, Werner; Kool, Marcel; Frühwald, Michael C.
in: AM J SURG PATHOL, Jahrgang 46, Nr. 9, 01.09.2022, S. 1277-1283.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - SMARCB1-deficient and SMARCA4-deficient Malignant Brain Tumors With Complex Copy Number Alterations and TP53 Mutations May Represent the First Clinical Manifestation of Li-Fraumeni Syndrome
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
N1 - Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.
PY - 2022/9/1
Y1 - 2022/9/1
N2 - Atypical teratoid/rhabdoid tumor (AT/RT) is a malignant central nervous system tumor predominantly affecting infants. Mutations of SMARCB1 or (rarely) SMARCA4 causing 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 of TP53 as 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 somatic TP53 mutations lead to the discovery of pathogenic/likely pathogenic TP53 variants 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 somatic TP53 mutations in children and young adults may represent the first clinical manifestation of Li-Fraumeni syndrome and should prompt genetic counseling and investigation for TP53 germline status.
AB - Atypical teratoid/rhabdoid tumor (AT/RT) is a malignant central nervous system tumor predominantly affecting infants. Mutations of SMARCB1 or (rarely) SMARCA4 causing 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 of TP53 as 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 somatic TP53 mutations lead to the discovery of pathogenic/likely pathogenic TP53 variants 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 somatic TP53 mutations in children and young adults may represent the first clinical manifestation of Li-Fraumeni syndrome and should prompt genetic counseling and investigation for TP53 germline status.
KW - Brain Neoplasms/complications
KW - Child
KW - DNA Copy Number Variations
KW - DNA Helicases/genetics
KW - Humans
KW - Li-Fraumeni Syndrome/complications
KW - Mutation
KW - Nuclear Proteins/genetics
KW - Rhabdoid Tumor/genetics
KW - SMARCB1 Protein/genetics
KW - Transcription Factors/genetics
KW - Tumor Suppressor Protein p53/genetics
U2 - 10.1097/PAS.0000000000001905
DO - 10.1097/PAS.0000000000001905
M3 - SCORING: Journal article
C2 - 35446794
VL - 46
SP - 1277
EP - 1283
JO - AM J SURG PATHOL
JF - AM J SURG PATHOL
SN - 0147-5185
IS - 9
ER -