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我科自1985年6月至1987年5月进行听觉脑干反应(ABR)筛选诊断小型听神经瘤(AN)的临床研究。对于具有感音神经性听力减退、耳鸣、眩晕症状或患有神经纤维瘤病的520例患者,首先给予ABR 检查,同时亦做有关的听力学及内耳道X 线检查。其中49例被ABR 定位诊断为小脑桥脑角(CPA)病变的患者,除6例拒绝做气CTC 外,43例做了常规CT 检查(平扫和增强),若常规CT 阴性继续做气CTC 检查(按此顺序的CT 检查称为CT 程序检查),肿瘤大小的标准以CT 测量为依据。ABR 和CT 程序检查阴性即排除AN。CT 检查发现40例CPA占位病灶,经手术和病理证实,4例为小型AN(肿瘤直径≤2cm,最小的仅有0.3cm),29例为大、中型AN,2例脑膜瘤,1例胆脂瘤,1例三叉神经纤维瘤,3例从小脑或脑干
Our department from June 1985 to May 1987 auditory brainstem response (ABR) screening of small acoustic neuroma (AN) clinical study. For 520 patients with sensorineural hearing loss, tinnitus, dizziness, or neurofibromatosis, ABR was first examined, along with audiology and internal auditory meatus X-ray examination. Of the 49 patients who were diagnosed as CPAP lesions by ABR, 43 patients underwent conventional CT (plain scan and contrast enhancement) except for 6 patients who refused to do CTC. If conventional CT was negative, CTC Examination (CT examination in this order is called CT procedure examination). The standard of tumor size is based on CT measurement. Negative ABR and CT procedures exclude AN. CT examination found 40 cases of CPA lesions confirmed by surgery and pathology, 4 cases of small AN (tumor diameter ≤ 2cm, the smallest only 0.3cm), 29 cases of large and medium-sized AN, 2 cases of meningioma, 1 case Cholesteatoma, 1 case of trigeminal neurofibroma, 3 cases from the cerebellum or brain stem