Kanzaki J, Ogawa K, Tsuchihashi N, Yamamoto M, Ogawa S, O-Uchi T
Department of Otolaryngology, School of Medicine, Keio University, Tokyo, Japan.
Acta Otolaryngol Suppl. 1991;487:114-9. doi: 10.3109/00016489109130455.
The authors' diagnostic procedure for unilateral acoustic neuroma and the reasoning behind it are explained. The actual methods involved will change with advances in methodology. At the present time, however, pure tone audiometry and simple radiographic imaging of the internal auditory canal (transorbital and Stenvers View) are first carried out. Then, if the hearing level (average hearing at 4 kHz and 8 kHz) is 70 dB or lower, auditory brain stem response audiometry is carried out. If it is 71 dB or higher, the patient is examined by MRI or CT. Contrast-enhanced CT is carried out when MRI is not available. Air CT is not necessary if MRI is available, but, in cases where hearing preservation is indicated, it may provide valuable information for identifying the tumor site within the internal auditory canal.
本文作者解释了单侧听神经瘤的诊断程序及其背后的推理。实际涉及的方法将随着方法学的进步而改变。然而，目前首先要进行纯音听力测定和内耳道的简单放射成像（经眶位和斯滕弗斯位）。然后，如果听力水平（4千赫和8千赫的平均听力）为70分贝或更低，则进行听性脑干反应测听。如果是71分贝或更高，则对患者进行磁共振成像（MRI）或计算机断层扫描（CT）检查。当无法进行MRI时，则进行增强CT检查。如果有MRI，空气CT不是必需的，但在需要保留听力的情况下，它可能为确定内耳道内的肿瘤部位提供有价值的信息。
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