Congress of Neurological Surgeons Systematic Review and Evidence-Based Guidelines for the Treatment of Adults With WHO Grade II Diffuse Glioma: Update
Clinical Snapshot
PICO Framework
| P — Population | Adults with WHO Grade II diffuse glioma |
| I — Intervention | Various treatment modalities including imaging, surgical approaches, radiotherapy, chemotherapy |
| C — Comparator | Previous 2015 guidelines and standard care approaches |
| O — Outcomes | Treatment recommendations, management strategies, and clinical outcomes for WHO Grade II diffuse glioma |
Bottom Line
This systematic review updates the 2015 Congress of Neurological Surgeons guidelines for WHO Grade II diffuse glioma management, covering imaging, surgery, pathology, radiotherapy, chemotherapy, and recurrence management. While the abstract demonstrates comprehensive scope and authoritative authorship from major neurosurgical societies, critical methodological details are limited. The guidelines represent an important benchmark for evidence-based neuro-oncology practice, though the certainty of recommendations cannot be assessed from the available information. For Australian clinicians, these guidelines would inform multidisciplinary management decisions in tertiary centres, complementing local protocols and PBS-funded treatment pathways. The emphasis on evidence over consensus opinion is encouraging, but full methodology and specific recommendations require review of the complete document to assess clinical utility and strength of evidence.
Key Findings
P Value: Not applicable for guidelines
Effect Size: Not specified in abstract
Primary Outcome: Updated evidence-based recommendations for WHO Grade II diffuse glioma management
Nnt Or Sensitivity: Not applicable - guideline recommendations rather than therapeutic interventions
Confidence Interval: Not provided
Clinical Application
High feasibility as guidelines align with standard Australian neuro-oncology practice patterns Relevant to Australian practice through RACS neurosurgical training, public hospital neuro-oncology services, and PBS-funded treatments. Guidelines would inform multidisciplinary team decisions in major centres like Peter MacCallum, Royal Melbourne, and other tertiary referral hospitals Australian adults with WHO Grade II diffuse glioma managed in neurosurgical and neuro-oncology centres
Abstract
BACKGROUND: The management of World Health Organization (WHO) grade II diffuse glioma is an important facet of all physicians involved in neuro-oncology. OBJECTIVE: This is an update of the evidence-based guidelines for management of WHO grade II diffuse gliomas published by the Congress of Neurological Surgeons and American Association of Neurological Surgeons in 2015. METHODS: The medical literature from January 1, 2013, through January 31, 2020, was searched to determine if information was available to update, modify, or create new recommendations related to imaging, surgical approaches, neuropathology and molecular markers, radiotherapy, chemotherapy, and management of tumor recurrence. RESULTS: The writing group used the information from the updated literature search to formulate recommendations based on this evidence and not simply built on biased consensus or expert opinion. CONCLUSION: This series of guideline documents provides an update of the information and recommendations provided in the 2015 version. It sets a benchmark as to the published information we have to support the management of this difficult disease. It also provides clues to key investigations that are necessary to move us toward effective control of WHO grade II diffuse gliomas.
References
- 1.Ormond, D. R., Badve, C., Redjal, N., Orringer, D., Lo, S., Ziu, M., & Olson, J. J. (2026). Congress of Neurological Surgeons Systematic Review and Evidence-Based Guidelines for the Treatment of Adults With WHO Grade II Diffuse Glioma: Update. Neurosurgery. https://doi.org/10.1227/neu.0000000000003912
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