桥小脑角(CPA)或内听道(IAC)脂肪瘤甚为少见,约占桥小脑角所有肿瘤的0.14%,连同作者报告的5例仅有28例报告。男女之比为2.4∶1。作者报告的5例脂肪瘤均位于内听道,以往的报告中仅有3例位于内听道。这8例内听道脂肪瘤患者最常见、最早出现的症状均为不对称的听力减退及单侧耳鸣,无面神经症状。作者报告的5例均无前庭症状。仅1例有耳痛,以往报告的3例内听道脂肪瘤患 The cerebellopontine angle (CPA) or IAC lipomas are rare, accounting for approximately 0.14% of all tumors in the cerebellopontine angle, and only 28 cases were reported in the 5 cases reported by the authors. The ratio between men and women is 2.4:1. The 5 lipomas reported by the authors were located in the inner auditory canal. In the previous report, only 3 cases were located in the inner auditory canal. The earliest manifestations of these 8 cases of hearing lipomas were asymmetric hearing loss and unilateral tinnitus, and no facial nerve symptoms. None of the five cases reported by the author had vestibular symptoms. Only 1 case had earache, 3 previously reported hearing lipomas