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來源資料
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題 名 | 無聽力喪失之聽神經瘤患者--三例報告=Acoustic Neuroma Without Hearing Impairment--Report of Three Cases |
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作 者 | 陳正蔚; 楊怡和; 吳志修; | 書刊名 | 中華民國耳鼻喉科醫學雜誌 |
卷 期 | 34:6 民88.11-12 |
頁 次 | 頁497-500 |
分類號 | 416.81 |
關鍵詞 | 聽神經瘤; 聽性腦幹反應; 前庭誘發筋性電位; Acoustic neuroma; Auditory brainstem response; Vestibular evoked myogenic potential; |
語 文 | 中文(Chinese) |
中文摘要 | 聽力正常的聽神經瘤3例,在影像型態學上均屬棒棒糖型,平均大小為2cm。3例圴有單側性耳鳴及顏面麻木的現象,1例則有頭暈之情形。3例中僅1例冰水溫差測驗無反應,其餘兩例圴正常。在聽性腦幹反應檢查方面,3例均出現第V波及I-V波間潛時延長之現象。棒棒糖型的聽神經瘤起於內聽道入口前,腫瘤大多往腦幹或小腦方向生長,故較少出現聽力喪失之現象。因此當病人出現單側性耳鳴,並合併有顏面麻木感時,雖聽力檢查為正常,仍應安排聽性腦幹反應檢查,以排除聽神經瘤之可能性。 |
英文摘要 | Three patients with acoustic neuroma presented with unilateral tinnitus and facial numbness but normal hearing were reported. All had lollipop-shaped tumors on magnetic resonance imaging. The mean size of the tumors was 2 cm in diameter. Only one patient had an absent ice water caloric test. However, all three patients had abnormal auditory brainstem response. Lollipop-shaped tumors represent medially arising schwannomas from the internal auditory canal. Hearing is relatively preserved because these tumors extended into the cerebellopontine angle instead of the internal auditory canal. In conclusion, in patients with unilateral tinnitus but normal hearing, auditory brainstem response test should be performed if facial numbness occurs. |
本系統中英文摘要資訊取自各篇刊載內容。