Facial function in hearing preservation acoustic neuroma surgery

Area of Science:

• Neurosurgery
• Otolaryngology
• Cranial Nerve Surgery

Background:

• Acoustic neuromas require surgical intervention, with varying approaches impacting facial nerve function.
• Hearing preservation techniques aim to maintain auditory function alongside tumor removal.
• Translabyrinthine surgery is a common approach for acoustic neuroma removal.

Purpose of the Study:

• To compare postoperative facial function between hearing preservation (HP) and translabyrinthine (TL) surgical approaches for acoustic neuroma.
• To evaluate if HP surgery leads to worse facial nerve outcomes than TL surgery.

Main Methods:

• Retrospective review of 315 acoustic neuroma surgeries (April 1989-July 1998).
• Analysis included 209 TL and 106 HP procedures (48 retrosigmoid, 58 middle fossa).
• Facial function assessed using House-Brackmann grading at multiple follow-up intervals.

Main Results:

• Facial function was not significantly worse after HP surgery compared to TL surgery.
• This finding held true for both short- and long-term follow-up periods.
• Comparisons were made for similarly sized tumors.

Conclusions:

• Postoperative facial nerve function should not be the sole determinant when choosing between HP and TL acoustic neuroma surgery.
• Both surgical approaches can achieve acceptable facial nerve outcomes.
• Shared decision-making regarding surgical approach should consider multiple factors beyond facial nerve function.