The cause of most acoustic neuromas is unknown .

事业最听神经瘤是未知之数。

Some studies have reported that long-term wireless phone users have increased rates of brain tumors , including malignant gliomas and benign acoustic neuromas .

已有早前的研究表明无线电话的长期使用者发生脑部肿瘤的概率更高，包括恶性神经胶质瘤和良性听神经瘤。

For the scientists who recommended the new classification , concern emerged from some evidence that heavy cell phone use might raise the risk of certain kinds of brain tumors , such as gliomas and acoustic neuromas .

对于推崇这种新划分的研究人士而言，相关证据表明高强度使用手机会增加罹患诸如神经胶质瘤（gliomas）、听神经瘤（acousticneuromas）等脑癌的几率。