what is acoustic neuroma?

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Post on 16-Aug-2015



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  1. 1. What is Acoustic Neuroma?
  2. 2. Acoustic neuroma (AN) is a benign (noncancerous) tumor located on the vestibulocochlear nerve. Acoustic NeuromaOuter Ear Middle Ear Vestibulocochlear Nerve Inner Ear
  3. 3. Vestibulocochlear Nerve The vestibulocochlear nerve is made up of the cochlear nerve and the vestibular nerve. It is the 8th cranial nerve (CN VIII). It connects the inner ear organs to the brainstem and is responsible for relaying auditory and balance information to the brain.
  4. 4. What are the symptoms of AN? Unilateral hearing loss that is typically more pronounced in the high frequencies. Tinnitus Feeling of fullness in the ear Vertigo Dizziness or imbalance Facial weakness or numbness Headache
  5. 5. 90% of AN cases are first identified by a reduction in hearing in one ear.
  6. 6. If an acoustic neuroma grows large enough it can press on the surrounding nerves, brainstem, and cerebellum and become life-threatening.
  7. 7. What is the cause of AN? There is no known cause of acoustic neuroma. Exposure to high-dose radiation is the only known environmental risk factor for AN. Patients with Neurofibromatosis Type II have a malfunctioning gene on chromosome 22. These patients can develop acoustic neuromas on both sides of the head.
  8. 8. How is acoustic neuroma diagnosed? Case History Audiologic evaluation by an Audiologist MRI is the gold standard for diagnosis of AN CT scan with contrast in cases where an MRI is not possible
  9. 9. How is acoustic neuroma treated? Observation (watch and wait) for small tumors Radiation Microsurgical removal Treatment will be determined by the size of the tumor, age and medical status of the patient, hearing status, other symptoms, and patient preference.
  10. 10. Will an acoustic neuroma cause lasting problems? An acoustic neuroma can cause permanent hearing loss in the affected ear, as well as tinnitus. Patients can work closely with an Audiologist to determine need for appropriate hearing technology.
  11. 11. Hearing options for those with AN In some cases, an AN can significantly affect hearing and speech discrimination abilities in the affected ear. Hearing technology options may include: Conventional hearing aid. CROS or BICROS hearing aid. Bone conduction device.
  12. 12. Resources: https://www.anausa.org/ http://www.mayoclinic.org/diseases-conditions/acoustic- neuroma/basics/definition/con-20023851

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