Selesnick S H, Deora M, Drotman M B, Heier L A
Department of Otorhinolaryngology, Weill College of Medicine, Cornell University, New York, USA.
Otolaryngol Head Neck Surg. 1999 Jun;120(6):815-8. doi: 10.1016/S0194-5998(99)70319-0.
Our objective is to report 4 cases of incidentally discovered acoustic neuromas (ANs) and to determine the incidence of asymptomatic ANs. A prospective study of 161 consecutive patients undergoing gadolinium-enhanced MRI (Gd-MRI) at a tertiary-care university-affiliated medical center was carried out from September 1994 to April 1995. The Gd-MRI scans were performed for tentative diagnoses other than AN or sensorineural hearing loss. In 161 consecutive patients examined, no ANs were found incidentally on Gd-MRI scans. Previous studies have suggested that the incidence of occult ANs is as high as 1%. On the basis of our results, we suggest that the actual incidence may be lower. However, our study is limited by its small size and the low incidence of ANs in the general population. Also reported are the clinical and MRI characteristics of 4 patients with incidentally diagnosed ANs.
我们的目的是报告4例偶然发现的听神经瘤（ANs）病例，并确定无症状听神经瘤的发生率。1994年9月至1995年4月，在一所大学附属三级医疗中心对161例连续接受钆增强磁共振成像（Gd-MRI）的患者进行了一项前瞻性研究。Gd-MRI扫描用于除听神经瘤或感音神经性听力损失以外的初步诊断。在连续检查的161例患者中，Gd-MRI扫描未偶然发现听神经瘤。先前的研究表明，隐匿性听神经瘤的发生率高达1%。根据我们的结果，我们认为实际发生率可能更低。然而，我们的研究受样本量小以及普通人群中听神经瘤发病率低的限制。本文还报告了4例偶然诊断为听神经瘤患者的临床和MRI特征。
