Clinical Scorecard: Timing Considerations in Repeat Resection for Recurrent Glioblastoma

At a Glance

Key Highlights

• Repeat resection can provide survival benefit (median 12-18 months) with acceptable neurological risk (~8% permanent deficits).
• Timing of repeat resection varies: upfront surgery, watch-and-wait, or salvage systemic/radiotherapy approaches are used.
• Optimal timing of repeat resection remains uncertain; delayed surgery may risk tumor progression affecting resectability and outcomes.

Guideline-Based Recommendations

Diagnosis

• Use MRI with contrast enhancement and RANO criteria to assess tumor recurrence.
• Exclude radiation-induced necrosis via histopathology before repeat resection.
• Confirm recurrence histopathologically after repeat resection.

Management

• Eligibility for repeat resection requires good performance status, surgically accessible tumor location, and multidisciplinary consensus.
• Repeat resection should maximize extent of resection (EOR) to improve survival.
• Consider upfront repeat resection or initial non-surgical therapy based on clinical and radiological factors.
• Use intraoperative MRI to guide tumor resection.

Monitoring & Follow-up

• Perform early postoperative MRI within 48 hours to assess extent of resection.
• Follow patients until death or loss to follow-up; monitor progression-free survival after repeat resection.
• Assess neurological deficits postoperatively and classify as transient (<30 days) or permanent.

Risks

• Approximately 8% risk of permanent postoperative neurological deficits after repeat resection.
• Delayed surgery may increase risk of tumor progression to less resectable or eloquent brain areas.
• Pseudo-progression can complicate timing decisions; occurs 3-6 months post initial therapy and may mimic recurrence.

Patient & Prescribing Data

150 patients with radiological suspicion of GB recurrence undergoing repeat resection

53% underwent upfront repeat resection; 29% received salvage non-surgical therapy before surgery; 13% managed with watch-and-wait; 4% deferred surgery by patient choice

Clinical Best Practices

• Stratify timing of repeat resection using mean interval (~54 days) from radiological suspicion to surgery.
• Use volumetric analysis and RANO Resect criteria to evaluate extent of resection.
• Define eloquent tumor locations carefully to assess surgical risk.
• Multidisciplinary tumor board decisions guide individualized treatment planning.
• Monitor for pseudo-progression to avoid premature or delayed interventions.

References

• WHO 2021 Classification of CNS Tumors
• RANO Criteria for Glioblastoma
• Stummer et al. Threshold for Residual Tumor Volume
• Chang et al. Definition of Eloquent Brain Areas