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A vestibular schwannoma (VS), also called acoustic neuroma, is a benign tumor that develops on the vestibulocochlear nerve that passes from the inner ear to the brain. The tumor originates when Schwann cells that form the insulating myelin sheath on the nerve malfunction.
The most common cerebellopontine angle (CPA) tumor is a vestibular schwannoma affecting cranial nerve VIII (80%), followed by meningioma (10%). The cranial nerves affected are (from most common to least common) : VIII (cochlear component), VIII (vestibular component), V Acoustic neuroma/vestibular schwannoma
Tumours can arise in the cerebellopontine angle. Four out of five of these tumours are vestibular schwannomas (commonly known as acoustic neuromas). [3] Others found include: Arachnoid cyst; Facial nerve tumour; Lipoma; Meningioma; Schwannoma of other cranial nerves (e.g. CN V >VII>IX, X, XI) Metastasis; Intracranial epidermoid cyst
Neurofibromatosis type II (also known as MISME syndrome – multiple inherited schwannomas, meningiomas, and ependymomas) is a genetic condition that may be inherited or may arise spontaneously, and causes benign tumors of the brain, spinal cord, and peripheral nerves.
A cochlear implant or auditory brainstem implant may help some who have hearing loss due to the condition. [1] In the United States, about 1 in 3,500 people have NF1 and 1 in 25,000 have NF2. [1] Males and females are affected equally often. [2] In NF1, symptoms are often present at birth or develop before 10 years of age. [1]
Acoustic neuroma (vestibular schwannoma) – benign neoplasm of Schwann cells affecting the vestibulocochlear nerve; Meningioma – benign tumour of the pia and arachnoid mater; Ménière's disease – causes sensorineural hearing loss in the low frequency range (125 Hz to 1000 Hz).
10-month-old Charlie, who has Usher syndrome, heard for the first time thanks to cochlear implants. / Credit: CBS Boston. For mom and dad, the procedure is life-changing. "To know she can hear and ...
A nerve sheath tumor is a type of tumor of the nervous system (nervous system neoplasm) which is made up primarily of the myelin surrounding nerves.Nerve sheath tumors can be benign or malignant, and may affect both the peripheral and central nervous systems.
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