Acoustic Neuroma : Diagnosis
The following test are carried out to diagnose acoustic neuroma:
Routine hearing tests may reveal a loss of hearing and speech discrimination (the patient can hear sound in that ear but cannot understand what is being said).
An auditory brainstem response test (ABR) may be done in some cases. This test measures the speed at which an electric impulse from the inner ear passes to the brain. The test is positive when an acoustic neuroma slows the signal down.
Magnetic resonance imaging (MRI) with a contrast dye is the most commonly performed type of scan to reveal an acoustic neuroma.