Diagnostic Approaches to Adult-Type Diffuse Glial Tumors: Comparative Literature and Clinical Practice Study

Area of Science:

• Neuro-oncology
• Molecular Diagnostics
• Radiology

Background:

• Gliomas are primary central nervous system tumors.
• The 2021 WHO CNS tumor classification prioritizes molecular biomarkers over histology for adult-type diffuse gliomas.
• Key biomarkers include isocitrate dehydrogenase (IDH) 1 or 2 status and 1p/19q codeletion.

Purpose of the Study:

• To review current diagnostic approaches for gliomas.
• To highlight the role of molecular diagnostics in glioma classification.
• To discuss the application and advancements of various MR imaging techniques in glioma management.

Main Methods:

• Literature review of glioma diagnostics and imaging.
• Analysis of the impact of the 2021 WHO classification on glioma diagnosis.
• Review of advanced MR imaging techniques including fMRI, DTI, perfusion, spectroscopy, and nuclear medicine imaging.

Main Results:

• Molecular markers like IDH status and 1p/19q codeletion are now primary for classifying adult-type diffuse gliomas.
• Advanced MR imaging techniques provide crucial insights into tumor characteristics, vascularity, metabolism, and cellularity.
• Accurate differentiation of treatment-related changes (pseudoprogression, pseudoresponse, radiation necrosis) is essential for effective patient management.

Conclusions:

• The integration of molecular diagnostics and advanced imaging has transformed glioma classification and management.
• Multimodal imaging is indispensable for surgical planning, treatment response assessment, and prognosis.
• A comprehensive understanding of these evolving diagnostic paradigms improves patient outcomes and guides future research.