Related Experiment Videos
Normal auditory brainstem response in patients with acoustic neuroma
S A Telian1, P R Kileny, J K Niparko
1Department of Otolaryngology-Head & Neck Surgery, University of Michigan Medical Center, Ann Arbor 48109.
The Laryngoscope
|January 1, 1989
Summary
Auditory brainstem response (ABR) tests are highly sensitive for acoustic neuromas. However, rare cases of normal ABR in patients with acoustic neuroma highlight the need for comprehensive audiological evaluation.
Area of Science:
- Audiology
- Neurology
- Neurosurgery
Background:
- Auditory brainstem response (ABR) testing is a sensitive audiological screening tool for acoustic neuroma.
- False-negative ABR results for eighth nerve tumors are considered rare.
Observation:
- A review of 120 resected acoustic neuromas identified two patients with false-negative ABR findings.
- These patients presented with asymmetric sensorineural hearing loss and unilateral tinnitus.
Findings:
- Both patients had completely normal auditory brainstem response results despite confirmed acoustic neuroma.
- This indicates that normal ABR does not entirely rule out the presence of an acoustic neuroma.
Implications:
- Comprehensive audiological evaluations are crucial for diagnosing acoustic neuroma, even with normal ABR.
- Delayed diagnosis can occur if relying solely on ABR, underscoring the importance of a thorough diagnostic process.