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What causes an acoustic neuroma?

Answer: 

About 5% of acoustic neuromas are caused by a hereditary condition called neurofibromatosis type II.

People with this type of acoustic neuroma are usually younger and may also get other types of neuromas.

All acoustic neuromas are rare - they affect one in 100,000 people. For 95% of people, they occur spontaneously and the cause is not known. Most of them are found in people 30 to 60 years old.

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