81. Audiology Net... Audiology Information For The Masses acoustic neuroma Audiological Tests Brain Tumor on the Auditory Nerve Auditory Brainstem Response Electronystagmography http://www.audiologynet.com/

Audiology Net Audiology Information for the Masses AudiologyNet is an audiology and hearing healthcare informational web site for a large population. It is dedicated to providing web site links in audiology for patients, family members, students, and healthcare providers. The information and web links listed at AudiologyNet are intended for informational purposes only and do not substitute for medical consultation with your personal physician or hearing healthcare provider. The information in each link is provided by an independent web server and cannot be guaranteed with respect to accuracy and timeliness of the material. Audiological Pathology Acoustic Neuroma Audiological Tests Brain Tumor on the Auditory Nerve Auditory Brainstem Response Electronystagmography Cerumen Impaction Otoacoustic Emissions Earwax Impaction Audiogram Cholesteatoma What is an Audiologist? General Hearing Loss Cochlear Implants ... Otitis Media Middle Ear Infection Video Otoscopy Neurology Basic Information Anatomy of the Ear Advanced Information Pediatric Audiology Hearing Loss in Children Search Engines Perforated Tympanic Membrane Perforated eardrum Tinnitus Ringing in the ears Please email any comments (last update April 02, 2005)

82. Mobile Phone Use And Acoustic Neuroma A study from the Institute of Environmental Medicine (IMM) at Karolinska Institutet, Sweden, found that 10 or more years of mobile phone use increase the http://www.eurekalert.org/pub_releases/2004-10/src-mpu101304.php

Public release date: 13-Oct-2004 E-mail Article Contact: Anna Persson anna.persson@imm.ki.se Swedish Research Council Mobile phone use and acoustic neuroma A study from the Institute of Environmental Medicine (IMM) at Karolinska Institutet, Sweden, found that 10 or more years of mobile phone use increase the risk of acoustic neuroma and that the risk increase was confined to the side of the head where the phone was usually held. No indications of an increased risk for less than 10 years of mobile phone use were found. At the time when the study was conducted only analogue (NMT) mobile phones had been in use for more than 10 years, and therefore we cannot determine if the results are confined to use of analogue phones, or if the results would be similar also after long term use of digital (GSM) phones. In close collaboration with the clinics where these patients are treated all new patients with acoustic neuroma were identified during a three year period in certain parts of Sweden. Persons without the disease were randomly selected from the population registry (controls). A nurse contacted all patients and controls and asked them if they wanted to participate in the study. All who agreed participated in a personal interview where detailed questions were asked about their mobile phone use and other issues of importance for the study. A total of about 150 acoustic neuroma patients and 600 healthy controls participated in the study. The risk of acoustic neuroma was almost doubled for persons who started to use their mobile phone at least 10 years prior to diagnosis. When the side of the head on which the phone was usually held was taken into consideration, we found that the risk of acoustic neuroma was almost four times higher on the same side as the phone was held, and virtually normal on the other side.

83. Acoustic Neuroma An acoustic neuroma is a type of benign tumour that grows in the canal connecting the brain to the inner ear. Symptoms may include difficulties with hearing http://www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Acoustic_neuroma?

84. Mobile Phone Use And Acoustic Neuroma - Karolinska Institutet Mobile phone use and acoustic neuroma found that 10 or more years of mobile phone use increase the risk och acoustic neuroma and that the risk increase http://info.ki.se/article_en.html?ID=2338

85. Loyola Univ. Health Sys. - Otolaryngology - Acoustic Neuroma acoustic neuroma is a noncancerous tumor that may develop from an The following are the most common symptoms for acoustic neuroma, however, http://www.luhs.org/health/topics/ent/acoustic.htm

You are here: Home Health Information Health Topics Otolaryngology Acoustic Neuroma What is Acoustic Neuroma? Acoustic Neuroma is a non-cancerous tumor that may develop from an overproduction of Schwann cells that press on the hearing and balance nerves in the inner ear. Schwann cells are cells that normally wrap around and support nerve fibers. If the tumor becomes large, it can press on the facial nerve or brain structure. What are the Symptoms of Acoustic Neuroma? The following are the most common symptoms for acoustic Neuroma, however, individuals may experience symptoms differently. When a Neuroma develops, it may cause any/all of the following:

86. Acoustic Neuroma An acoustic neuroma is a benign (noncancerous) tumor on the eighth cranial nerve leading from the The first symptoms of an acoustic neuroma include http://healthgate.partners.org/browsing/browseContent.asp?fileName=12075.xml&tit

87. Acoustic Neuroma Removal An acoustic neuroma is a benign (noncancerous) tumor on the acoustic nerve This fact sheet focuses on microsurgical removal of an acoustic neuroma. http://healthgate.partners.org/browsing/browseContent.asp?fileName=14759.xml&tit

88. Acoustic Neuroma Treatment Options At Mayo Clinic acoustic neuroma treatment options from Mayo Clinic. Find neurosurgery for this condition at mayoclinic.org. http://www.mayoclinic.org/acoustic-neuroma/

Home About Mayo Clinic Jobs Contact Us Mayo Clinic Locations: Arizona Florida Minnesota Mayo Clinic ... Medical Services Acoustic Neuroma Acoustic Neuroma Overview Diagnosis Treatment Options Appointments ... Medical Services Treatment of Acoustic Neuroma at Mayo Clinic Mayo Clinic neurologists and neurosurgeons are considered international authorities in diagnosing and treating tumors of the nervous system, including acoustic neuromas. They care for nearly 2,000 patients with brain and nervous system tumors each year, making Mayo Clinic one of the largest tumor centers in the world. Patients travel to Mayo Clinic from all 50 states and from 39 countries for brain and nervous system tumor treatment. Mayo Clinic brings together specialists in neurology, neurosurgery and radiology to tailor a treatment plan for each patient. Diagnosis Hearing loss, dizziness and ringing in the ears are the most common symptoms of acoustic neuroma, but may be due to other conditions. Mayo has many tools to help make an accurate diagnosis. Read more about diagnosis of acoustic neuroma Treatment Options Treatment options include observation, surgical removal and radiotherapy. Which option is best depends upon the size of the tumor and the age and general health of the patient. The two important considerations in treatment are preserving the facial nerve and saving hearing, whenever possible.

89. InteliHealth: Acoustic Neuroma InteliHealth Featuring Harvard Medical School s consumer health information. For more than 550 diseases and conditions, learn What Is It?, Symptoms, http://www.intelihealth.com/IH/ihtIH/WSIHW000/9339/9407.html

chrome_imgPreload('gifChr_mid_but_home_mo_1','http://img.intelihealth.com/i/C/Chr_mid_but_home-o.gif'); chrome_imgPreload('gifChr_mid_but_comm_mo_2','http://img.intelihealth.com/i/C/Chr_mid_but_comm-o.gif'); chrome_imgPreload('gifChr_mid_but_dental_mo_3','http://img.intelihealth.com/i/C/Chr_mid_but_dental-o.gif'); chrome_imgPreload('gifChr_mid_but_drug_mo_4','http://img.intelihealth.com/i/C/Chr_mid_but_drug-o.gif'); chrome_imgPreload('gifChr_mid_but_askexpert_mo_5','http://img.intelihealth.com/i/C/Chr_mid_but_askexpert-o.gif'); chrome_imgPreload('gifChr_mid_but_medical_mo_6','http://img.intelihealth.com/i/C/Chr_mid_but_medical-o.gif'); chrome_imgPreload('gifChr_mid_but_chats_mo_7','http://img.intelihealth.com/i/C/Chr_mid_but_chats-o.gif'); chrome_imgPreload('gifchr_mid_but_news_mo_8','http://img.intelihealth.com/i/c/chr_mid_but_news-o.gif'); chrome_imgPreload('gifChr_mid_but_privacy_mo_9','http://img.intelihealth.com/i/C/Chr_mid_but_privacy-o.gif'); Advertisement Acoustic Neuroma What Is It? Symptoms Diagnosis Expected Duration ... Additional Info What Is It? An acoustic neuroma is a type of benign (noncancerous) brain tumor that grows in the middle ear. It is one of the most common types of benign brain tumors, and causes hearing loss.

90. Acoustic Neuroma Neurotologic workup for retrocochlear lesion (ie acoustic neuroma). 85% specificity in distinguishing acoustic neuroma (retrolabyrinthine) from http://www.ucsf.edu/nreview/06.4-Oncology-HistologicalType/AcousticNeuroma.html

Acoustic Neuroma Definition Epidemiology Pathology Genetics Pathophysiology superior vestibular interface between stroma of oligodendroglia and Schwann cells that neoplastic transformation occurs. Characteristically, acoustic schwannomas arise in the vestibular division of VIII within the porous acousticus. Early enlargement compresses the cochlear nerve and labyrinthine blood vessels which supply the organ of Corti. The neoplasm expands and erodes the porus acousticus. The mass then intrudes from its bony canal into the CP angle. facial nerve tends to be stretched over the top of the tumor while the trigeminal nerve is compressed as it exits from the lateral pons. Caudal extension brings it into contact with the IX-XIth nerves and medial growth may contact the VIth nerve. Cerebellar herniation follows pronounced growth; hydrocephalus can follow. Gross Microscopic Antoni A . Aligned, compact, variable prominent interwoven fascicles of Schwann cells Antoni B . Porous and less structured; its cells are clustered about blood vessels, microcysts, xanthomatous cells, and sites of antecedent hemorrhage. Verocay bodies . Hyalinized vessels are seen. EM Clinical Features Symptoms Tinnitus is the most common initial symptom (70%).

91. RNID.org.uk: Information And Resources: Our Factsheets And Leaflets: Medical: Fa An acoustic neuroma is a rare and slowgrowing benign tumour that develops on the eighth An acoustic neuroma grows extremely slowly over several years. http://www.rnid.org.uk/information_resources/factsheets/medical/factsheets_leafl

RNID: For deaf and hard of hearing people. Skip Navigation Accessibility Help desk Site index ... Login Search Advanced search Join us Donate online Campaign with us ... [skip to content] Information and resources Information and resources home Our factsheets and leaflets Benefits and services Communication ... Your area Information Line (Freephone) Telephone Textphone information@rnid.org.uk Acoustic neuroma (factsheet) About this factsheet This factsheet is part of RNID's medical range. It is written for people who want to know more about acoustic neuromas. Read this factsheet to find out about: what is an acoustic neuroma? what causes an acoustic neuroma the symptoms of acoustic neuroma how an acoustic neuroma is treated At the end of this factsheet we give you details of useful organisations you can contact for further information. What is an acoustic neuroma? An acoustic neuroma is a rare and slow-growing benign tumour that develops on the eighth cranial nerve, which is the nerve of hearing and balance. It is not cancerous. The eighth cranial nerve has many different names. The part that carries the hearing information may be called the acoustic nerve, the auditory nerve or the cochlear nerve. The part that carries balance information is called the vestibular nerve. Together these parts are called the vestibulo-cochlear nerve or the eighth cranial nerve. The eighth cranial nerve runs through the bone of the skull, carrying both hearing and balance information from the inner ear to the brain. As it passes through the bone the nerve runs alongside the facial nerve, which carries information from the brain to the muscles of the face.

92. Neuroma, Acoustic Vestibular schwannoma (acoustic neuroma) and neurofibromatosis A preformatted MEDLINE search on the topic of acoustic neuroma is also available. http://omni.ac.uk/browse/mesh/D009464.html

low graphics Neuroma, Acoustic Neuroma, Acoustic other: Central Nervous System Neoplasms Neuroma, Acoustic Acoustic neuroma This information, aimed at the lay person, provides information about acoustic neuroma (brain tumours). The fact sheet is also available in PDF, which requires the Adobe Acrobat Reader. Published on the Web by the Royal National Institute for Deaf People (RNID). Patient Education Handout [Publication Type] Neuroma, Acoustic Vestibular schwannoma (acoustic neuroma) and neurofibromatosis This public-orientated fact sheet about vestibular schwannoma (also known as acoustic neuroma) and neurofibromatosis is made available on the Web by the National Institute on Deafness and other Communication Disorders, which is part of the US National Institutes of Health. The leaflet explains what vestibular schwannoma is, its diagnosis and treatment, and also explains the difference between unilateral and bilateral vestibular schwannomas. Links are included to further sources of information. This leaflet was last updated February 2004. Patient Education Handout [Publication Type] Neuroma, Acoustic

93. Acoustic Neuroma The term acoustic neuroma is a misnomer. Vestibular shwannoma is the proper term for Vestibular symptoms in acoustic neuroma are surprisingly absent. http://www.bcm.edu/oto/otologyprimer/acousticneu/an.html

ACOUSTIC NEUROMA Definition The term acoustic neuroma is a misnomer. Vestibular shwannoma is the proper term for these tumors which represent 8 to 10% of all intracranial extraxial tumors and a substantial proportion of posterior fossa tumors. Origin Acoustic neuromas arise from the superior or inferior division of the vestibular nerve. They are a benign tumor of schwann cell origin. They arise most commonly in the internal auditory canal at the region of the vestibular nerve called the transition zone. This is the location where peripheral nervous system borders with the central nervous system myelination. These tumors are slow growing, derive their blood supply from the divisions of the anterior inferior cerebellar artery as well as dural blood vessels. Although they histologically lack a capsule, they behave as encapsulated tumors and produce their symptoms by compression, firstly of the nerves within the internal auditory canal and secondarily by compression of other cranial nerves in the posterior foss as well as by direct compression of the brainstem and cerebellum.[1, 2] Epidemiology Acoustic neuromas occur at the rate of 1 in 100000 population. In 95% of these cases the tumors occur spontaneously. In 5% they are associated with

94. Acoustic Neuroma Surgery: A Microscopic View acoustic neuromas are slowgrowing, benign tumors which frequently start in the Surgery to remove an acoustic neuroma is a delicate, involved procedure. http://www.bcm.edu/oto/cfbd/ansurgbw.html

Acoustic Neuroma Surgery: A Microscopic View Caution The photographs displayed in this web site are very graphic. More sensitive visitors may want to view only the text. The photographs may be viewed by clicking on the Figure labels of each description. Baylor Otorhinolaryngology link. Go to page bottom Surgery to remove an acoustic neuroma is a delicate, involved procedure. Depending on the skill of the surgeon and the size of the tumor, surgery can take from two and one-half hours to over 12 hours. The following pictures taken through a surgical microscope represent some of the phases in the removal of a 1.8 x 2.0 cm tumor. The "translabyrinthine" approach was used. This approach involves drilling through the mastoid bone behind the ear, and removing the semicircular canals. This surgery will leave the patient without hearing on the affected side and with only one functioning vestibular nerve. The amount of time for the patient to adapt to the use of the remaining vestibular nerve varies, and that length of time is somewhat determined by how severely the nerve is impaired prior to surgery. In general, the more impaired the vestibular nerve is pre-operatively, the shorter the recovery time post-operatively. The translabyrinthine approach is one of the safest approaches for removing an acoustic neuroma, and is the approach preferred in tumors in which hearing preservation is not an issue, and the location and size of the tumor warrant its use.

95. NORD - National Organization For Rare Disorders, Inc. Acoustic Neurilemoma; Bilateral acoustic neuroma; Cerebellopontine Angle acoustic neuroma is a benign (noncancerous) growth that begins at the 8th http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Acoustic Neur

96. Acoustic Neuroma An acoustic neuroma is a , noncancerous, often slowgrowing of the nerve that connects the ear to the brain (8th cranial or auditory) nerve. http://www.lifespan.org/ADAM/English/HIE/000778.htm

Careers at Lifespan Volunteer your time Other ways to give Lifespan's A - Z Health Information Library Injury Disease Nutrition Poison ... Prevention Acoustic neuroma Definition An acoustic neuroma is a benign , noncancerous, often slow-growing tumor of the nerve that connects the ear to the brain (8th cranial or auditory) nerve. Alternative Names Vestibular schwannoma; Tumor - acoustic; Cerebellopontine angle tumor; Angle tumor Causes These tumors are thought to arise when there is a defect in a certain tumor suppressor gene, which normally prevents tumors from occurring. The cause of the genetic defect is not known. However, acoustic neuroma is often linked with the genetic disorder neurofibromatosis type 2 Acoustic neuromas are relatively uncommon, but they are one of the most common types of brain tumors. They affect approximately 1 out of 100,000 people per year. The tumor is most commonly located at the base of the brain, where the auditory nerve leaves the skull cavity and enters the bony structure of the inner ear. Central nervous system Review Date: 4/13/2004 Reviewed By: John A. Daller, M.D., Ph.D., Department of Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas. Review provided by VeriMed Healthcare Network.

97. Acoustic Neuroma/Vestibular Schwannoma Vestibular Schwannomas commonly called by the misnomer, acoustic neuroma are benign growths arising from the balance nerve. Because they are benign, http://www.umm.edu/otolaryngology/acoustic_neuromas.html

var MenuLinkedBy='AllWebMenus [2]', awmBN='530'; awmAltUrl=''; Maryland Hearing and Balance Center Request An Appointment Our Mission Doctors/Audiologists ... Online Resources Related Resources Within UMM Otorhinolaryngology-Head and Neck Surgery (ENT) Translate using Google to Spanish German French Italian Portuguese Maryland Hearing and Balance Center Acoustic Neuroma/Vestibular Schwannoma What is a Vestibular Schwannoma? How is a Vestibular Schwannoma Treatead? Observation Radiotherapy ... Surgery and Surgical Approaches What is a Vestibular Schwannoma? Vestibular Schwannomas commonly called by the misnomer, acoustic neuroma are benign growths arising from the balance nerve. Because they are benign, the do not metastasize, or spread to other parts of the body. They are uncommon, and occur in approximately 10 people per million per year in the United States. They tend to be found in patients older than 40 years. The vast majority (95 percent) of these tumors are sporadic, meaning they are not passed on through genes. Sporatic tumors occur in only one ear, and there are no known risk factors. Rarely these tumors are associated with a genetic disease called Neurofibromatosis Type II. Patients with Neurofibromatosis develop tumors at a younger age, usually have tumors on both sides and also have other manifestations, including benign tumors of the brain and dura (the covering of the brain). Vestibular Schwannomas are generally slow growing (less than 3 millimeters per year) and may not grow at all if followed over time. However, tumor growth is not predictable, and some tumors grow more rapidly. When tumors are small they may give no symptoms or very subtle symptoms, such as a slight hearing loss or a noise in the ear (tinnitus). When tumors grow, they begin to cause injury to the hearing nerve and balance nerve, by compressing them. Patients may experience severe hearing loss (either suddenly or progressively over a period of years) or balance problems. Large tumors may compress the brainstem and result in headaches and other symptoms of increased intracranial pressure. Symptoms don’t correlate well with size. Some patients with very small tumors may have obvious symptoms and likewise, some patients with large tumors may have no symptoms at all.

98. SRS-X, The SRS Educational Resource For Radiology, Right Acoustic Neuroma Diagnosis. Right acoustic neuroma (schwannoma). Discussion. acoustic neuromas account for 80% of cerebellopontine angle tumours. http://www.radiology.co.uk/srs-x/cases/072/d.htm

Home Cases Main Index Skull Index SRS-X The SRS Educational Resource Case 72 Right acoustic neuroma Right sided hearing loss This middle aged patient presented with progressive right sided sensorineural hearing loss. MR imaging was performed. A T2 axial image and T1 coronal post contrast image are shown. What is the diagnosis? Findings On the T2 axial image there is a round mass of mixed signal in the right cerebellopontine angle. It causes slight displacement of the brain stem medially, and extends into the auditory canal on the right. The edge of the mass makes an acute angle with the petrous bone. On the T1 coronal image there is intense enhancement. The tail within the canal is clearly seen. A CT study of the same patient was also available: an image is included for comparison. Diagnosis Right acoustic neuroma (schwannoma) Discussion Acoustic neuromas account for 80% of cerebellopontine angle tumours. They are more common in females and in patients with neurofibromatosis, especially of the central type (NF type 2). The main differential diagnosis is a meningioma. These account for 15% of CPA masses and also enhance brightly. However they do not tend to extend into, or arise from, the canal and often have a broad base with a less acute angle between tumour and bone (the 'tail'). There may be associated bony sclerosis.

99. Healthfinder® - Acoustic Neuroma Carefully selected government and nonprofit health information on acoustic neuroma. http://www.healthfinder.gov/Scripts/SearchContext.asp?topic=7

100. Acoustic Neuroma (neuroma) on this nerve, the term acoustic neuroma is commonly used. An acoustic neuroma usually begins in a tiny tube called the internal auditory http://www.vestibular.org/neuroma.html

Acoustic Neuroma (Reviewed by David Wiegand, M.D., Medical Research Advisor, Acoustic Neuroma Association, and Jenny R. Broberg, M.P.H., Member Services Director, Acoustic Neuroma Association.) Balance disorders can have a number of causes. One cause of imbalance, dizziness, and occasionally vertigo is a benign tumor termed an acoustic neuroma. Acoustic neuromas are rare. About 2,000 acoustic neuromas are diagnosed in the U.S. each year. The correct name for this tumor should be vestibular schwannoma , because it arises from the schwann cell (lining) layer of the vestibular portion of the eighth cranial nerve. However, this eighth nerve has two parts, the acoustic (hearing) part as well as the vestibular (balance) part, and since this is a non-malignant tumor (neuroma) on this nerve, the term "acoustic neuroma" is commonly used. An acoustic neuroma usually begins in a tiny tube called the internal auditory canal, which is the passage carrying the eighth and other nerves and blood vessels between the inner ear (where the balance mechanisms are located), and the brain. As the tumor grows inside this bony tube and then out against the brain, it distorts adjacent nerves. As the eighth nerve is stretched by the tumor, both hearing and balance may be affected. Some acoustic neuromas cause a period of unsteadiness or imbalance without other symptoms such as one-sided hearing loss or intense ringing in the ear. Vestibular nerve function may be gradually lost without much balance disturbance. These patients are not as likely to suffer long-term imbalance if the tumor is surgically removed and the non- functioning nerve sacrificed. A functioning vestibular nerve at the time of necessary surgical severing may require some time for bodily adjustment to the quick loss of this part of the balance system, and so the patient may suffer imbalance for several months after surgery.

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