[Genomic and Epigenomic Abnormalities in Gliomas]

Area of Science:

• Neuro-oncology
• Molecular Biology
• Genetics

Background:

• Significant findings in glioma research emerged from genetic, epigenetic, and immunohistochemical studies.
• The 2016 World Health Organization (WHO) classification of central nervous system tumors integrated molecular data with pathological findings.
• The Consortium to Inform Molecular and Practical Approaches to CNS Tumor Taxonomy-Not Official WHO (cIMPACT-NOW) was established to refine CNS tumor classifications.

Purpose of the Study:

• To review the genetic and epigenetic features of gliomas.
• To discuss the relevance of these features to the current WHO classification.
• To highlight features considered in cIMPACT-NOW recommendations for future classifications.

Main Methods:

• Review of scientific literature on glioma genetics and epigenetics.
• Analysis of findings contributing to the WHO classification.
• Examination of recommendations from cIMPACT-NOW.

Main Results:

• Genetic and epigenetic alterations are crucial for glioma classification.
• The 2016 WHO classification marked a significant shift towards molecular-based diagnosis.
• cIMPACT-NOW provides ongoing recommendations for refining glioma taxonomy.

Conclusions:

• Molecular and epigenetic profiling are essential for accurate glioma diagnosis and classification.
• The integration of molecular data has transformed neuro-oncology.
• Continuous updates, guided by initiatives like cIMPACT-NOW, are vital for advancing glioma classification.