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Hearing preservation in acoustic tumor surgery
1House Ear Clinic, Los Angeles, California.
Otolaryngologic Clinics of North America
|June 1, 1992
Summary
Hearing preservation is achievable for acoustic tumors via retrosigmoid or middle fossa surgery. Early diagnosis of small tumors with good preoperative hearing offers the best chance for successful hearing preservation outcomes.
Area of Science:
- Neurosurgery
- Audiology
- Oncology
Background:
- Acoustic tumors can impact hearing, necessitating surgical intervention.
- Hearing preservation is a key surgical goal for patients with acoustic tumors.
- Advances in imaging have led to earlier detection of smaller tumors.
Purpose of the Study:
- To evaluate the feasibility and outcomes of hearing preservation surgery for acoustic tumors.
- To identify predictors of successful hearing preservation.
- To assess the role of early diagnosis in optimizing surgical candidacy.
Main Methods:
- Retrosigmoid and middle fossa surgical approaches were utilized.
- Preoperative audiological assessments, including Auditory Brainstem Response (ABR) and Electronystagmography (ENG), were performed.
- Gadolinium-enhanced magnetic resonance imaging (MRI) was used for tumor detection and characterization.
Main Results:
- Hearing preservation is a realistic surgical goal, particularly for small tumors with good preoperative hearing.
- Preoperative factors like ABR, ENG, and imaging characteristics can help predict hearing preservation success.
- Hearing function rarely improves post-surgery and may decline over time.
Conclusions:
- Early diagnosis of small acoustic tumors via enhanced MRI improves candidacy for hearing preservation surgery.
- Retrosigmoid and middle fossa approaches offer viable options for preserving hearing.
- Patient selection based on tumor size and preoperative hearing is crucial for optimizing outcomes.