Unilateral Sensori-neural Hearing Disturbance Caused by Intramedullary Cerebellar Tumors —Three Case Reports—
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- 西澤 茂
- 浜松医科大学脳神経外科
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- YOKOYAMA Tetsuo
- Department of Neurosurgery, Hamamatsu University School of Medicine
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- HINOKUMA Kaoru
- Department of Neurosurgery, Hamamatsu University School of Medicine
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- UEMURA Kenichi
- Department of Neurosurgery, Hamamatsu University School of Medicine
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Three patients presented with unilateral sensori-neural hearing disturbance as the initial symptom of cerebellar tumors: a 19-year-old female with a medulloblastoma (Case 1), a 45-year-old male with a cerebellar low-grade glioma (Case 2), and a 49-year-old female with a cerebellar hemangioblastoma (Case 3). In Cases 1 and 2, the whole length of the eighth cranial nerve was intact according to magnetic resonance imaging and intraoperative findings. In Case 3, the intracerebellar tumor had bulged into the cerebellopontine cistern, compressing the eighth cranial nerve near the brainstem. Auditory evoked brainstem responses showed only the first wave in all three patients, and the following waves could not be discriminated. Unilateral sensori-neural hearing disturbance occurs very rarely in patients with intramedullary cerebellar lesions because the auditory neural pathway is bilaterally innervated. Intramedullary tumors may cause unilateral sensori-neural hearing disturbance by infiltrating or causing edematous changes of the eighth cranial nerve or the cochlear nucleus in the brainstem, or by compressing the nerve in the cistern. The symptoms are the same as those of acoustic neurinoma, so intramedullary cerebellar tumors should be considered in the differential diagnosis of unilateral sensorineural hearing disturbance.
収録刊行物
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- Neurologia medico-chirurgica
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Neurologia medico-chirurgica 37 (9), 701-707, 1997
一般社団法人 日本脳神経外科学会
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詳細情報 詳細情報について
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- CRID
- 1390001205050919040
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- NII論文ID
- 110002277332
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- NII書誌ID
- AN00358613
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- COI
- 1:STN:280:ByiH2s7lvFI%3D
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- ISSN
- 13498029
- 04708105
- http://id.crossref.org/issn/04708105
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- PubMed
- 9330537
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- 本文言語コード
- en
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- JaLC
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- PubMed
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