A novel BRAF::PTPRN2 fusion in meningioma: a case report.
Acta Neuropathol Commun
; 11(1): 194, 2023 Dec 08.
Article
em En
| MEDLINE
| ID: mdl-38066633
ABSTRACT
Gene fusion events have been linked to oncogenesis in many cancers. However, gene fusions in meningioma are understudied compared to somatic mutations, chromosomal gains/losses, and epigenetic changes. Fusions involving B-raf proto-oncogene, serine/threonine kinase (BRAF) are subtypes of oncogenic BRAF genetic abnormalities that have been reported in certain cases of brain tumors, such as pilocytic astrocytomas. However, BRAF fusions have not been recognized in meningioma. We present the case of an adult female presenting with episodic partial seizures characterized by déjà vu, confusion, and cognitive changes. Brain imaging revealed a cavernous sinus and sphenoid wing mass and she underwent resection. Histopathology revealed a World Health Organization (WHO) grade 1 meningioma. Genetic profiling with next generation sequencing and microarray analysis revealed an in-frame BRAFPTPRN2 fusion affecting the BRAF kinase domain as well as chromothripsis of chromosome 7q resulting in multiple segmental gains and losses including amplifications of cyclin dependent kinase 6 (CDK6), tyrosine protein-kinase Met (MET), and smoothened (SMO). Elevated pERK staining in tumor cells provided evidence of activated mitogen-activated protein kinase (MAPK) signaling. This report raises the possibility that gene fusion events may be involved in meningioma pathogenesis and warrant further investigation.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Fusão Oncogênica
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Proteínas Proto-Oncogênicas B-raf
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Neoplasias Meníngeas
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Meningioma
Limite:
Adult
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Female
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Humans
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article