What is acoustic neuroma?
Acoustic neuroma is a rare tumor. It's not cancer. It grows slowly from an overproduction
of Schwann cells and is also called a vestibular schwannoma. The tumor then presses
on the hearing and balance nerves in the inner ear. Schwann cells normally wrap around
and support nerve fibers. A large tumor can press on the facial nerve, which controls
facial muscles and sensation. Or it can press on brain structures.
There are 2 types of acoustic neuromas:
Unilateral acoustic neuromas. This type affects only one ear. It's the most common type of acoustic neuroma. This
tumor may develop at any age. It most often happens between ages 30 and 60. Acoustic
neuroma may be the result of nerve damage caused by environmental factors. The only
certain environmental risk factor is past radiation to the head. It's unclear if prolonged
exposure to loud noises is a cause of acoustic neuromas.
Bilateral acoustic neuromas. This type affects both ears and is inherited. It's caused by a genetic problem called
What causes acoustic neuroma?
Acoustic neuroma can be caused by:
What are the symptoms of acoustic neuroma?
These are the most common symptoms of acoustic neuroma:
Hearing loss on one side, can’t hear high-frequency sounds
Feeling of fullness in the ear
A ringing in the ear (tinnitus), on the side of the tumor
Balance problems or unsteadiness
Facial numbness and tingling with possible paralysis of a facial nerve. This is rare.
Headaches, a clumsy walk, and mental confusion
The symptoms of acoustic neuroma may look like other conditions or health problems.
Always talk with your healthcare provider for a diagnosis.
How is acoustic neuroma diagnosed?
Acoustic neuromas look like other middle and inner ear problems. They may be hard
to diagnose. An ear exam and a hearing test are often done first. A CT scan and MRI
can help to find and measure the tumor.
How is acoustic neuroma treated?
Treatment will depend on your symptoms, age, and general health. It will also depend
on how severe the condition is.
Treatment may include watching and waiting, surgery, or radiation. Surgery for larger
tumors can damage hearing, balance, and facial nerves. Another treatment choice is
radiosurgery, such as Gamma Knife®. This uses focused radiation to reduce the size
or blunt the growth of the tumor.
What are possible complications of acoustic neuroma?
If the tumor gets big enough, it can press against the brain stem. This can affect
neurological function or even become life-threatening.
Key points about acoustic neuroma
Acoustic neuroma is a tumor. It's not cancer. It affects hearing and balance when
the tumor presses on the nerves in the inner ear.
It's a rare tumor that affects middle-aged people.
It can be caused by radiation exposure to the head and neck. Some types are inherited.
It's diagnosed using hearing tests and imaging tests.
Treatment can include watching and waiting, surgery, or radiation.
Tips to help you get the most from a visit to your healthcare provider:
Know the reason for your visit and what you want to happen.
Before your visit, write down questions you want answered.
Bring someone with you to help you ask questions and remember what your provider tells
At the visit, write down the name of a new diagnosis, and any new medicines, treatments,
or tests. Also write down any new instructions your provider gives you.
Know why a new medicine or treatment is prescribed, and how it will help you. Also
know what the side effects are.
Ask if your condition can be treated in other ways.
Know why a test or procedure is recommended and what the results could mean.
Know what to expect if you do not take the medicine or have the test or procedure.
If you have a follow-up appointment, write down the date, time, and purpose for that
Know how you can contact your provider if you have questions.