The signs and symptoms of acoustic neuroma develop from direct effects on the main nerve or from the tumor pressing on adjacent nerves, nearby blood vessels or brain structures.
As the tumor grows, it may be more likely to cause signs and symptoms, although tumor size doesn't always determine effects. It's possible for a small tumor to cause significant signs and symptoms.
You may experience signs and symptoms such as:
- Hearing loss, usually gradual — although in some cases sudden — and occurring on only one side or more pronounced on one side
- Ringing (tinnitus) in the affected ear
- Unsteadiness, loss of balance
- Dizziness (vertigo)
- Facial numbness and very rarely, weakness
In rare cases, an acoustic neuroma may grow large enough to compress the brainstem and threaten your life.
When to see your doctor
See your doctor if you notice hearing loss in one ear, ringing in your ear or trouble with your balance. Early diagnosis of an acoustic neuroma may help keep the tumor from growing large enough to cause serious consequences, such as total hearing loss or a life-threatening buildup of fluid within your skull.