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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. Normally, Schwann cells function beneficially to protect the nerves which ...
The most reliable indicator for acoustic neuromas from the ABR is the interaural latency differences in wave V: the latency in the impaired ear is prolonged. Different studies have indicated the sensitivity of ABR for detection of acoustic neuromas 1cm or larger to be between 90 and 95%. Sensitivity for neuromas smaller than 1cm are 63-77%.
The translabyrinthine approach was developed by William F. House, M.D., [2] who began doing dissections in the laboratory with the aid of magnification and subsequently developed the first middle cranial fossa and then the translabyrinthine approach for the removal of acoustic neuroma.
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).
Detection of bilateral acoustic neuroma by imaging-procedures; First degree relative with NF2 and the occurrence of neurofibroma, meningiomas, glioma, or Schwannoma; First degree relative with NF2 and the occurrence of juvenile posterior subcapsular cataract. The criteria have varied over time. [17]
Magnetic resonance imaging (MRI) is typically used in spinal nerve sheath tumor diagnosis. [1] Each nerve sheath tumor type has a few different associated features on MRI imaging. Neurofibromas and malignant peripheral nerve sheath tumors can be difficult to distinguish from each other and may require additional testing, including PET scans ...
Vic Fangio's coaching career started in the 1970s as a high school assistant in Pennsylvania and has taken him across the country in various stops as he grew into one of the most innovative ...
A common subtype is the vestibular schwannoma (acoustic neuroma). [5] Neurofibromas: Benign tumors that grow on nerves, commonly associated with neurofibromatosis type I (NF1). [2] Malignant peripheral nerve sheath tumors (MPNSTs): Rare but aggressive cancers that arise from peripheral nerves or nerve sheath cells. [6]