Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study
IntroductionEpithelioid glioblastoma (eGBM) is one of the rare glioblastoma (GBM) variants in the current World Health Organization (WHO) categorization of central nervous system (CNS) tumours. However, the diagnostic basis and molecular features of eGBM have not been clearly defined to date. In thi...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-11-01
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| Series: | Frontiers in Oncology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fonc.2022.980059/full |
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| author | Rui Pan Xiaotong Wang Ru Fang Qiuyuan Xia Nan Wu Qiu Rao |
| author_facet | Rui Pan Xiaotong Wang Ru Fang Qiuyuan Xia Nan Wu Qiu Rao |
| author_sort | Rui Pan |
| collection | DOAJ |
| description | IntroductionEpithelioid glioblastoma (eGBM) is one of the rare glioblastoma (GBM) variants in the current World Health Organization (WHO) categorization of central nervous system (CNS) tumours. However, the diagnostic basis and molecular features of eGBM have not been clearly defined to date. In this study, we aimed to molecularly characterize these tumours.MethodsThe clinicopathological, molecular, and immunohistochemical characteristics of 12 cases of eGBM were investigated.ResultsThe tumours were found to be made up of epithelioid and rhabdoid cells when examined under a microscope. Six cases (50%) harboured the BRAF V600E mutation, and NF1 mutation was detected in 2 eGBM cases (16.7%). CDKN2A/B homozygous deletion was seen in 5 cases (41.7%). TP53 mutation was recognized in 2 instances (16.7%), and TERT promoter mutation was recognized in 5 cases (41.7%).DiscussioneGBM is characterized by high molecular heterogeneity and has molecular overlaps between low-grade gliomas. Moreover, rather than being a variant or entity, the biological significance of the "epithelioid" appearance may be reduced to a simply morphological pattern. In order to target the proper treatment to suitable patients, molecular stratification via genome-wide molecular profiling will be crucial. |
| first_indexed | 2024-04-13T08:56:14Z |
| format | Article |
| id | doaj.art-22d8b14fb80f4234a30bb7dd8082f55d |
| institution | Directory Open Access Journal |
| issn | 2234-943X |
| language | English |
| last_indexed | 2024-04-13T08:56:14Z |
| publishDate | 2022-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Oncology |
| spelling | doaj.art-22d8b14fb80f4234a30bb7dd8082f55d2022-12-22T02:53:16ZengFrontiers Media S.A.Frontiers in Oncology2234-943X2022-11-011210.3389/fonc.2022.980059980059Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing studyRui PanXiaotong WangRu FangQiuyuan XiaNan WuQiu RaoIntroductionEpithelioid glioblastoma (eGBM) is one of the rare glioblastoma (GBM) variants in the current World Health Organization (WHO) categorization of central nervous system (CNS) tumours. However, the diagnostic basis and molecular features of eGBM have not been clearly defined to date. In this study, we aimed to molecularly characterize these tumours.MethodsThe clinicopathological, molecular, and immunohistochemical characteristics of 12 cases of eGBM were investigated.ResultsThe tumours were found to be made up of epithelioid and rhabdoid cells when examined under a microscope. Six cases (50%) harboured the BRAF V600E mutation, and NF1 mutation was detected in 2 eGBM cases (16.7%). CDKN2A/B homozygous deletion was seen in 5 cases (41.7%). TP53 mutation was recognized in 2 instances (16.7%), and TERT promoter mutation was recognized in 5 cases (41.7%).DiscussioneGBM is characterized by high molecular heterogeneity and has molecular overlaps between low-grade gliomas. Moreover, rather than being a variant or entity, the biological significance of the "epithelioid" appearance may be reduced to a simply morphological pattern. In order to target the proper treatment to suitable patients, molecular stratification via genome-wide molecular profiling will be crucial.https://www.frontiersin.org/articles/10.3389/fonc.2022.980059/fullglioblastomaepithelioid glioblastomaBRAF V600Emolecular geneticscentral nervous system tumour |
| spellingShingle | Rui Pan Xiaotong Wang Ru Fang Qiuyuan Xia Nan Wu Qiu Rao Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study Frontiers in Oncology glioblastoma epithelioid glioblastoma BRAF V600E molecular genetics central nervous system tumour |
| title | Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study |
| title_full | Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study |
| title_fullStr | Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study |
| title_full_unstemmed | Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study |
| title_short | Epithelioid glioblastoma exhibits a heterogeneous molecular feature: A targeted next-generation sequencing study |
| title_sort | epithelioid glioblastoma exhibits a heterogeneous molecular feature a targeted next generation sequencing study |
| topic | glioblastoma epithelioid glioblastoma BRAF V600E molecular genetics central nervous system tumour |
| url | https://www.frontiersin.org/articles/10.3389/fonc.2022.980059/full |
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