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I.はじめに
小脳橋角部腫瘍は全脳腫瘍の10%前後を占めその大部分が聴神経腫瘍である。最初に患者は耳鼻咽喉科を訪れることが多く,その早期診断に耳鼻咽喉科医のなす役割は大きいといえる。聴神経腫瘍(以下AT)の典型的症候として一側性の進行性感音難聴,耳鳴,Bruns型眼振,前庭反応低下などが挙げられ,またX線上内耳道拡大が強調されている。
In six cases of acoustic neurinoma with atypical symptoms, the following problems are summerized.
1. Caloric test with ice-water is still one of the best screening tests.
2. Examinations of the internal acoustic meatus must be done in every case with facial palsy, facial numbness, gustatory disturbance.
3. In patient with sudden deafness and facial palsy, otoneurological examinations are indispensable to rule out acoustic neurinoma.
4. If a discrepancy among the several routine test is existed, further examinations are required.
5. We should inform other clinicians in our specialty about nature of acoustic neurinoma.
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