Low-grade gliomas in adults

Area of Science:

• Neuro-oncology
• Neurosurgery
• Radiation Oncology

Background:

• Adult supratentorial low-grade gliomas are well-differentiated primary brain tumors common in young adults.
• These tumors exhibit slow growth, infiltrate brain tissue, and have a propensity for malignant transformation.
• The optimal management and timing of interventions for these tumors are subjects of ongoing debate.

Purpose of the Study:

• To review current understanding and management strategies for adult supratentorial low-grade gliomas.
• To discuss the roles and controversies surrounding surgical and radiotherapeutic interventions.
• To highlight the impact of emerging imaging and molecular techniques.

Main Methods:

• Literature review and synthesis of current evidence on low-grade glioma management.
• Analysis of the efficacy and limitations of surgical resection and radiotherapy.
• Evaluation of the role of molecular markers (e.g., 1p/19q allelic loss) and advanced imaging.

Main Results:

• Evidence supporting the correlation between extent of surgical resection and survival is limited.
• Radiotherapy improves progression-free survival but not overall survival and may cause cognitive deficits.
• Chemosensitivity is observed in a subset of oligodendroglial tumors, linked to 1p/19q allelic loss.
• New imaging and molecular techniques offer insights but have not yet significantly altered clinical practice.

Conclusions:

• The optimal management strategy for low-grade gliomas is not yet definitively established.
• Molecular genetics and advanced imaging are enhancing prognostication and the understanding of tumor natural history.
• Continued research is crucial for refining treatment approaches and improving patient outcomes.