Congress of Neurological Surgeons Systematic Review and Evidence-Based Guideline on Surgical Resection for the Treatment of Patients With Vestibular Schwannomas: Update

Neurosurgery 98:272–277, 2026

These updated Congress of Neurological Surgeons guidelines review surgical management of sporadic vestibular schwannomas using literature from 2015–2022, reaffirming many prior recommendations and highlighting persistent evidence gaps. Key recommendations address approach selection (middle fossa, retrosigmoid, translabyrinthine), hearing-preservation surgery options, and counseling patients about outcomes after prior stereotactic radiosurgery.

The document details systematic review methods, inclusion criteria, and evidence grading, noting most data are class III and insufficient to prove superiority of specific surgical approaches for many questions. It emphasizes individualized treatment decisions, need for multicenter registries or trials, and future research priorities to resolve unanswered clinical issues.

Surgical Approach Selection: No surgical approach (middle fossa, retrosigmoid, or translabyrinthine) has proven superiority for facial nerve preservation or gross total resection in sporadic vestibular schwannoma; choice depends on individual patient factors and tumor characteristics.

Hearing Preservation: Hearing preservation surgery via middle fossa or retrosigmoid approach may be considered for patients with good preoperative hearing as an alternative to observation, but evidence for long-term superiority is limited.

Subtotal Resection and Radiosurgery: Subtotal resection followed by stereotactic radiosurgery does not have sufficient evidence to support better facial nerve or hearing outcomes compared to complete resection.

Microsurgery After SRS: Patients undergoing microsurgical resection after prior stereotactic radiosurgery should be counseled about increased risk of subtotal resection and worse facial nerve function.

Trigeminal Neuralgia: Surgical resection may provide better relief of trigeminal neuralgia symptoms compared to stereotactic radiosurgery in patients with sporadic vestibular schwannoma.

Balance and Observation: There is insufficient evidence to support surgery or radiosurgery for improving preoperative balance problems, and no clear evidence that surgery should be primary treatment for small tumors eligible for observation.

Evidence Quality: All reviewed evidence is class III (retrospective series, flawed controls), with significant potential for bias and limitations in drawing strong conclusions.

Future Directions: Improved data from multicenter registries or randomized trials are needed to clarify optimal management, as current recommendations reflect standard practice but lack high-level evidence for many questions.