2021 World Health Organization Classification of Brain Tumors

Author:

Meredith David M.,Pisapia David J.

Abstract

ABSTRACT Objective The classification of brain tumors is a rapidly evolving field that requires extensive integration of molecular diagnostic findings from an expanding set of platforms and assays. This article summarizes the schema presented in the 5th edition of the World Health Organization (WHO) classification of central nervous system (CNS) tumors while highlighting diagnostic molecular findings and discussing the strengths and weaknesses of commonly available testing modalities. Latest Developments Several major changes in practice were introduced with the 5th edition of the CNS WHO classification, including molecular grading of adult diffuse gliomas, the introduction of many new entities within the spectrum of pediatric gliomas and glioneuronal tumors, and the widespread adoption of methylation classes as useful or even necessary diagnostic criteria. Additionally, several revisions to nomenclature (eg, IDH-mutant gliomas) were introduced for simplicity and to disambiguate from other tumor types. Essential Points The classification of brain tumors continues to grow in complexity alongside our improved understanding of their nuanced molecular underpinnings.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Genetics (clinical),Neurology (clinical)

Reference85 articles.

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