Hypoglossal schwannoma compressing the brain stem; A case report.

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Schwannomas of the hypoglossal nerve are interesting because of the variety of associated symptoms. We describe here a Schwannoma of the hypoglossal nerve with extra and intracranial extensions which compressed the brain stem.A 62-year old female was admitted to our hospital because of a tumor on the right side of the neck and occasional headaches. Cranial nerves I to XI were intact, but paralysis and atrophy of the right side of the tongue were noted. She had signs of increased intracranial pressure. Computed tomographic scans were quite useful to delineate the destruction of the hypoglossal canal and jugular foramen. Magnetic resonance imaging scans were also informative, showing the relationship between the tumor and the surroundings. Staged otological and neurosurgical resections were required because of the size of the intracranial extension. The infratemporal fossa approach was used to resect the extracranial tumor.
耳鼻咽喉科臨床学会の論文