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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%.
For asymptomatic or incidental schwannomas or neurofibromas, only continued imaging is typically indicated to assess whether tumor growth is occurring. [1] Surgical resection may be an option for tumors causing extensive radicular pain or other symptoms, and for tumors exhibiting aggressive behavior. [1]
Patients with these tumors often have signs and symptoms corresponding to compression of both nerves. Acoustic neuroma (vestibular schwannoma) – benign neoplasm of Schwann cells affecting the vestibulocochlear nerve; Meningioma – benign tumour of the pia and arachnoid mater
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]
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The assessment considers factors such as the nature, progression, and duration of the patient's symptoms, as well as any relevant medical history. [ 8 ] Because nervous system neoplasms can have a wide range of presentations, clinical evaluation is often followed by neuroimaging to confirm or rule out the presence of a tumor.
Ted Lange is reflecting on his memories of The Love Boat — and how guest star Gene Kelly didn't turn out to be as "grumpy" as he was led to believe.. During the latest episode of Steve Kmetko ...