The only confirmed risk factor for acoustic neuroma is having a parent with the rare genetic disorder neurofibromatosis type 2.
The person has a 50% chance of having an unaffected child. A person with an autosomal dominant disorder - in this example, the father - has a 50% chance of having an affected child with one changed gene. You need only one changed gene to be affected by this type of disorder. It's located on one of the nonsex chromosomes, called autosomes. In an autosomal dominant disorder, the changed gene, also called a mutation, is a dominant gene. See your doctor if you notice hearing loss in one ear, ringing in your ear or trouble with your balance.Įarly diagnosis of an acoustic neuroma may help keep the tumor from growing large enough to cause serious consequences, such as total hearing loss. In rare cases, an acoustic neuroma may grow large enough to compress the brainstem and become life-threatening. Facial numbness and weakness or loss of muscle movement.Hearing loss, usually gradually worsening over months to years - although in rare cases sudden - and occurring on only one side or more severe on one side.
Pressure from the tumor on nearby nerves controlling facial muscles and sensation (facial and trigeminal nerves), nearby blood vessels, or brain structures may also cause problems.Īs the tumor grows, it may cause more noticeable or severe signs and symptoms.Ĭommon signs and symptoms of acoustic neuroma include: They usually happen because of the tumor's effects on the hearing and balance nerves. Signs and symptoms of acoustic neuroma are often easy to miss and may take many years to develop.
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