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What is acoustic neuroma?
Acoustic neuroma is a non-cancerous growth (a tumour) in the brain. It grows on the acoustic nerve in the brain, the nerve that controls hearing and balance. The common symptoms are hearing loss and vertigo.
Does Acoustic neuroma cause vertigo?
As the tumor grows, it exerts pressure on the inner ear and causes severe vertigo
What are the symptoms of Acromelagy?
Acromelagy is caused by an excess of growth hormone, and usually occurs in adults. The major symptoms of acomelagy are bone deformities. The cheek bones, skull, width of the nose, feet and hands become enlarged; and the lower jaw typically grows out.
What is a swanoma tumor and how bad are they?
A Swanoma Tumor is a bundle of nerve cells The correct spelling is schwannoma. A schwannoma (sh-won-oma) is a tumor of the tissue covering nerves called the nerve sheath. These tumours develop from a type of cell called a Schwann cell, which gives them their name. Schwannomas are often not cancerous (benign). The commonest type of benign schwannoma is the acoustic neuroma. This can cause deafness because it grows on a nerve called the 8th cranial nerve, which controls hearing.
What are the symptoms of soft tissue sarcoma?
Soft tissue sarcoma is a cancer that grows in the connective tissue that separates the bodies organs. In early stages they may be no symptoms. As the sarcoma grows symptoms include a lump or swelling, pain and blockage in blood flow or digestive processes depending on where the cancer is located.
What are symptoms of soft tissue sarcoma?
Soft tissue sarcoma is a cancer that grows in the connective tissue that separates the bodies organs. In early stages they may be no symptoms. As the sarcoma grows symptoms include a lump or swelling, pain and blockage in blood flow or digestive processes depending on where the cancer is located.
Acoustic neuroma?
DefinitionAn acoustic neuroma is a slow-growing tumor of the nerve that connects the ear to the brain. This nerve is located behind the ear right under the brain.An acoustic neuroma is benign, which means it does not spread to other parts of the body or invade the tissue around it. However, it can damage several important nerves as it grows.Alternative NamesVestibular schwannoma; Tumor - acoustic; Cerebellopontine angle tumor; Angle tumorCauses, incidence, and risk factorsAn acoustic neuroma is believed to occur when there is a defect in a gene that normally prevents tumors from forming. The cause of the genetic defect is not known. However, acoustic neuroma can be linked with the genetic disorder neurofibromatosis type 2(NF2).Acoustic neuromas are relatively uncommon.SymptomsThe symptoms vary based on the size and location of the tumor. Because the tumor grows so slowly, symptoms usually start after the age of 30.Common symptoms include:Abnormal sensation of movement (vertigo)Hearing loss in the affected ear that makes it hard to hear conversationsRinging (tinnitus) in the affected earLess common symptoms include:Difficulty understanding speechDizzinessHeadache Upon waking up in the morningWakes you from sleepWorse when lying downWorse when standing upWorse when coughing, sneezing, straining, or lifting (Valsalva maneuver)With nausea or vomitingLoss of balanceNumbness in the face or one earPain in the face or one earSleepinessVision problemsWeakness of the faceSigns and testsThe health care provider may diagnose an acoustic neuroma based on your medical history, an examination of your nervous system, or tests.Often, the physical exam is normal at the time the tumor is diagnosed. Occasionally, the following signs may be present:DroolingFacial droopingon one sideUnsteady walkDilated pupil on one side only (See: Eyes, pupils different size)The most useful test to identify an acoustic neuroma is an MRI of the head. Other useful tests to diagnose the tumor and tell it apart from other causes of dizziness or vertigo include:Head CTHearing test (audiology)Test of equilibrium and balance (electronystagmography)Test of hearing and brainstem function (brainstem auditory evoked response)Test for vertigo (caloric stimulation)TreatmentDepending on the size and location of the tumor, you and your health care provider must decide whether to watch the tumor (observation) or try to remove the tumor.Many acoustic neuromas are small and grow very slowly. Small tumors with few or no symptoms may be followed. Regular MRI scans will be done.If they are not treated, some acoustic neuromas can damage the nerves involved in hearing, as well as the nerves responsible for movement and feeling in the face. Very large tumors can lead to a buildup of fluid (hydrocephalus) in the brain, which can be life-threatening.Removing an acoustic neuroma is more commonly done for:Larger tumorsTumors that are causing symptomsTumors that are growing quicklyTumors that are growing near a nerve or part of the brain that is more likely to cause problemsSurgery is done to remove the tumor and prevent further hearing loss or other nerve damage.Stereotactic radiosurgery focuses high-powered x-rays on a small area. It is considered to be a form of radiation therapy, not a surgical procedure. It may be used:To slow down the growth of tumors that are hard to remove with surgeryTo treat patients who are unable to have surgery, such as the elderly or people who are very sickRemoving an acoustic neuroma can damage nerves, causing loss of hearing or weakness in the face muscles. This damage is more likely to occur when the tumor is next to or around the nerves.Expectations (prognosis)An acoustic neuroma is not cancer. The tumor does not spread (metastasize) to other parts of the body. However, it may continue to grow and press on important structures in the skull.People with small, slow-growing tumors may not need treatment.Once hearing loss occurs, it does not return after surgery.ComplicationsBrain surgery can completely remove the tumor in most cases.Most people with small tumors will have no permanent paralysis of the face after surgery. However, about two-thirds of patients with large tumors will have some permanent facial weakness after surgery.Approximately one-half of patients with small tumors will still be able to hear well in the affected ear after surgery.There may be delayed radiation effects after radiosurgery, including nerve damage, loss of hearing, and paralysis of the face.Calling your health care providerCall your health care provider if you experience new or worsening hearing loss or vertigo (dizziness).ReferencesBrackmann DE, Arriaga MA. Neoplasms of the posterior fossa. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier;2010:chap 177.Battista RA. Gamma knife radiosurgery for vestibular schwannoma. Otolaryngol Clin North Am. 2009;42:635-654.Sweeney P, Yajnik S, Hartsell W, Bovis G, Venkatesan J. Stereotactic radiotherapy for vestibular schwannoma. Otolaryngol Clin North Am. 2009;42:655-663.
A geranium plant grows toward light This is caused by what?
Auxins which are plant hormones.
What kind of mold grows on strawberries?
The kind of mold that grows on strawberries is gray mold. Mold is caused by moisture on the fruit and it appears as a gray-white fuzz.
Disease caused by a type of bacterium that grows when sealed inside food cans and jars?
Botulism
What disease is caused by a type of bacterium that grows when sealed inside food cans and jars?
Botulism
This disease is caused by a fungus that grows in the damp warm areas between toes?
Athletes Foot
