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Acoustic Schwannoma which is also call by the name of Vestibular Schwannoma is quite a rare and slowly progressive neoplasm obtain in the internal auricle , specifically of the nervus that connect the ear to the brainiac ( the listening nerve ) . Despite ordinarily being benign , an Acoustic Schwannoma or Vestibular Schwannoma that grows and is not treat can severely bear upon neurologic social occasion and becomes life - sinister .
Acoustic Schwannoma is a type of brain neoplasm that develops in the eighth cranial nervus , which controls sense of hearing and balance and is located in the inner auricle near the back of the skull . One part of the 8th cranial nerve transmits phone and the other part sends balance selective information to the genius from the inner auricle . It is one of the 12 cranial nerves that originate in the brainstem .
About 5 % of all primary brain tumors are Acoustic Schwannoma or Vestibular Schwannoma .
What Is The Cause Of Acoustic Schwannoma or Vestibular Schwannoma?
Acoustic Schwannoma or Vestibular Schwannoma are believed to develop from an over production of Schwann cell that press on the earshot and balance nerves in the inner ear . Schwann mobile phone are cells that normally wrap around and support nerve fibers . If the tumor becomes prominent , it can press on the facial nerve or brain structure . This type of brain tumor usually modernize in adults between the ages of 30 and 60 .
masses with the hereditary precondition neurofibromatosis 2 often germinate acoustic schwannoma or vestibular schwannoma in both ears . Neurofibromatosis 2 causes neoplasm on the nerve of the head and spinal corduroy and can induce mastermind tumors .
What Are The Symptoms Of Acoustic Schwannoma or Vestibular Schwannoma?
The following are the most common symptoms of acoustic schwannoma or vestibular schwannoma . However , each individual may live symptoms differently .
When a neuroma develop , it may cause any or all of the following :
The symptoms of acoustical schwannoma or vestibular schwannoma may resemble other conditions or aesculapian problems . Always consult your physician for a diagnosis .
How Is Acoustic Schwannoma or Vestibular Schwannoma Diagnosed?
Because symptom of acoustic schwannoma or vestibular schwannoma resemble other middle and inner capitulum condition , they may be hard to name . Preliminary symptomatic function include ear examination and audition trial run . Computerized tomography ( CT)andmagnetic resonance imaging ( MRI ) scanshelp to determine the location and size of the tumor .
former diagnosing of acoustic schwannoma offers the best chance for successful discourse .
A diagnosis of acoustical schwannoma or vestibular schwannoma at Johns Hopkins involves :
Hearing Test ( Audiometry):A test of hearing function , which mensurate how well the affected role hear sounds and manner of speaking , is ordinarily the first trial performed to name acoustical schwannoma . The patient listens to sounds and speech while wear thin earphones attached to a automobile that records response and measure auditory sense affair . The audiogram may show increased “ pure tone norm ” ( PTA ) , increased “ speech receipt threshold ” ( SRT ) and decreased “ talking to secernment ” ( SD ) .
Brainstem Auditory Evoked Response ( BAER):This test is performed in some patients to provide information on brain moving ridge activity as a response to clicks or tones . The patient listens to these sounds while wear electrode on the scalp and earlobe and headphone . The electrode beak up and read the brain ’s reception to these sound .
Scans Of The Head : If other tests show that the patient role may have acoustic schwannoma or Vestibular Schwannoma , charismatic resonance imaging ( MRI ) is used to support the diagnosing . MRI uses magnetic field and radio wave , rather thanx - re , and computers to create elaborate pictures of the mind . It shows optical “ slash ” of the brainiac that can be fuse to create a three - dimensional motion picture of the tumor . A contrast dyestuff is inject into the patient . If an acoustical neuroma is present , the tumor will soak up more dye than normal brain tissue paper and come out clearly on the scan . The MRI usually shows a densely “ enhancing ” ( bright ) tumor in the internal auditory canal .
How Is Acoustic Schwannoma or Vestibular Schwannoma Treated?
Acoustic Schwannoma or Vestibular Schwannoma can often be removed wholly with surgical operation . However , many Acoustic Schwannoma are so little that they may not need immediate treatment .
The Treatment For Acoustic Schwannoma or Vestibular Schwannoma depends on many component , including :
Surgical Treatment Options For Acoustic Schwannoma or Vestibular Schwannoma : handling include operating theatre , radiosurgery and sometimes observance . Neurosurgeons and neuro - otologists at Johns Hopkins perform several types of craniotomy to remove acoustic neuromas . Surgical craniotomy approaches include the suboccipital , translabyrinthine approach and middle fossa approaches .
Non - Surgical Treatment Options For Acoustic Neuromas : Surgery for larger tumour is complicate by the likely damage to auditory modality , balance , and facial nerves . Another handling option is radiosurgery , which uses carefully focused radiation to reduce the sizing or fix the emergence of the tumor .
For patient role with little Acoustic Schwannoma or Vestibular Schwannoma , surgery and radiation therapy are equally effective . Doctors at Johns Hopkins generally recommend radiation therapy to handle former patients .
Radiation therapy ( radiotherapy and stereotactic radiosurgery ) — For radiosurgery , single vs. fractionated ( multiple smaller intervention rather than one large treatment ) are option . The fractionated stereotactic radiosurgery ( FSR ) appears to declare oneself very high rates of ascendance with preservation of hearing and saving of the facial persuasiveness .
observance — For some slow - growing Acoustic Schwannoma or Vestibular Schwannoma observation with detain discourse may be acceptable . This is a common treatment pick for senior or infirm affected role with balmy symptoms where the endangerment of therapy may be corking and where the tumour may not grow during their lifespan .
Post - Surgical Treatment For Acoustic Neuromas : After intervention for Acoustic Schwannoma or Vestibular Schwannoma , some patients see hearing loss , cerebrospinal fluid leak , damage to the nerve in the face and other problems . Johns Hopkins offers comprehensive operative treatment and rehabilitation care for all of these problems .
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