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Mlika M, Mokni M, Mezni F, Rammeh S. Daily management of gliomas, glioneuronal, and neuronal tumors in the era of the 2021 WHO classification of nervous tumors. Front Neurol 2024; 15:1407572. [PMID: 39135755 PMCID: PMC11317277 DOI: 10.3389/fneur.2024.1407572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 06/26/2024] [Indexed: 08/15/2024] Open
Affiliation(s)
- Mona Mlika
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Department of Pathology, Trauma and Major Burn Center, Tunis, Tunisia
| | - Moncef Mokni
- Department of Pathology, Farhat Hached Hospital, Sousse, Tunisia
| | - Faouzi Mezni
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Soumeya Rammeh
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia
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Figarella-Branger D, Appay R, Metais A, Tauziède-Espariat A, Colin C, Rousseau A, Varlet P. [The 2021 WHO classification of tumours of the central nervous system]. Ann Pathol 2021; 42:367-382. [PMID: 34865882 DOI: 10.1016/j.annpat.2021.11.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 11/15/2021] [Indexed: 10/19/2022]
Abstract
Rapid technical advances in molecular biology allowed for the identification of key genetic alterations in central nervous system (CNS) tumors. Our ever-expanding knowledge of brain tumor genetics and the development of new technologies, such as DNA-methylation profiling, required an update of the 2016 fourth edition of the WHO classification of CNS tumors. Updates were regularly published by the Consortium to Inform Molecular Practical Approaches to CNS Tumor Taxonomy-Not Official WHO (c-IMPACT-NOW) until the publication of the fifth edition of the WHO classification of CNS tumors in 2021. In that edition, new types and subtypes are introduced and criteria for histo-molecular diagnostic and grading are refined, especially for diffuse gliomas. The definition of a broad category "diffuse glioma, pediatric subtype" (low or high grade) is a major improvement of the classification. Moreover, the nomenclature was simplified and aligned with that of other blue books. The 2021 edition truly advances the role of molecular diagnostics in CNS tumor classification. Methyloma profiling may become a cornerstone of CNS tumor diagnostic. The new WHO classification will lead to better management of brain tumor patients.
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Affiliation(s)
- Dominique Figarella-Branger
- Aix-Marseille Univ, CNRS, INP, Inst Neurophysiopathol, Marseille, France; APHM, CHU Timone, Service d'Anatomie Pathologique et de Neuropathologie, Marseille, France.
| | - Romain Appay
- Aix-Marseille Univ, CNRS, INP, Inst Neurophysiopathol, Marseille, France; APHM, CHU Timone, Service d'Anatomie Pathologique et de Neuropathologie, Marseille, France
| | - Alice Metais
- Service de neuropathologie, GHU Paris psychiatrie et neurosciences, hôpital Sainte-Anne, Paris université, Paris, France
| | - Arnault Tauziède-Espariat
- Service de neuropathologie, GHU Paris psychiatrie et neurosciences, hôpital Sainte-Anne, Paris université, Paris, France
| | - Carole Colin
- Aix-Marseille Univ, CNRS, INP, Inst Neurophysiopathol, Marseille, France
| | - Audrey Rousseau
- Département de pathologie, CHU d'Angers, Angers, France; CRCINA université de Nantes, université d'Angers, Angers, France
| | - Pascale Varlet
- Service de neuropathologie, GHU Paris psychiatrie et neurosciences, hôpital Sainte-Anne, Paris université, Paris, France
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