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Ultra-Fast Intraoperative IDH-Mutation Analysis Enables Rapid Stratification and Therapy Planning in Diffuse Gliomas.

Theo F J Kraus1, Beate Alinger-Scharinger1, Celina K Langwieder1

  • 1Institute of Pathology, University Hospital Salzburg, Paracelsus Medical University, Müllner Hauptstraße 48, A-5020 Salzburg, Austria.

International Journal of Molecular Sciences
|October 16, 2025
PubMed
Summary

The Idylla platform accurately detects isocitrate dehydrogenase (IDH) mutations in diffuse gliomas intraoperatively. This rapid IDH testing aids in quick patient stratification and treatment planning for brain tumors.

Keywords:
IDH mutationglioblastomagliomaintegrated diagnosisintraoperative genetics

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Area of Science:

  • Neuro-oncology
  • Molecular Diagnostics
  • Cancer Genomics

Background:

  • Diffuse gliomas are common adult primary brain tumors.
  • Accurate isocitrate dehydrogenase (IDH) mutation status is crucial for classifying CNS tumors per WHO 2021 guidelines.
  • Timely molecular analysis is essential for effective patient stratification and treatment planning.

Purpose of the Study:

  • To evaluate the Idylla platform for intraoperative IDH-mutation status assessment in diffuse gliomas.
  • To compare the performance of the Idylla IDH-mutation assay with standard next-generation sequencing (NGS).
  • To assess the turnaround time of the Idylla platform versus NGS for IDH mutation detection.

Main Methods:

  • Analysis of formalin-fixed paraffin-embedded (FFPE) and intraoperative snap-frozen diffuse glioma tissue samples.
  • Utilized the Idylla platform for rapid IDH-mutation testing.
  • Compared Idylla results with standard next-generation sequencing (NGS) analysis.

Main Results:

  • The Idylla IDH-mutation assay demonstrated 100% concordance with NGS analysis for both FFPE and intraoperative samples.
  • The Idylla system provided results in approximately 90 minutes.
  • NGS analysis required 7 to 27 days for results.

Conclusions:

  • The Idylla platform offers a rapid and accurate method for intraoperative IDH-mutation analysis in diffuse gliomas.
  • Ultra-fast intraoperative analysis facilitates immediate patient stratification and treatment decisions.
  • Integration of Idylla testing into molecular tumor boards enhances neuro-oncological care.