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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 ...
Unilateral VS plus any two of meningioma, glioma, neurofibroma, schwannoma, posterior subcapsular lenticular opacities; Two or more meningioma plus unilateral VS or any two of glioma, schwannoma and cataract. Another set of diagnostic criteria is the following: [citation needed] Detection of bilateral acoustic neuroma by imaging-procedures
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
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 ]
Neurofibromatosis type II, in which bilateral acoustic neuromas (tumors of the vestibulocochlear nerve or cranial nerve 8 (CN VIII) also known as schwannoma) develop, often leading to hearing loss. [16] Schwannomatosis, in which painful schwannomas develop on spinal and peripheral nerves. [17]
Pleural schwannoma typically shows fatty degeneration, hemorrhage, perivascular hyalinization, and cystic formation thus giving heterogenous hyperintensities on T2 weighted images. Complete surgical removal of pleural schwannoma is the usual treatment. [11] Cellular schwannoma is a relatively rare variation. Cellular schwannoma is nearly ...
About 1/3 of patients have segmental schwannomatosis, which means that the schwannomas are limited to a single part of the body, such as an arm, a leg or the spine. [12] There are several cases where people with schwannomatosis have developed a vestibular schwannoma (acoustic neuroma). An acoustic neuroma is a schwannoma on the vestibular nerve ...
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.