Ayani N, Shea J J
Arch Otolaryngol. 1982 Aug;108(8):501-3. doi: 10.1001/archotol.1982.00790560039011.
During systematic study of temporal bone histopathology at The Deafness Foundation, Memphis, we found an unsuspected small schwannoma arising solely from the cochlear nerve, compressing the facial nerve within the internal auditory canal. The primary temporal bone pathologic finding was bilateral otosclerosis. Compression of the facial nerve by schwannomas of the cochlear nerve is well know to occur at a late stage and produce a lower motor neuron facial paralysis but, in the present case, although the growth of th tumor compressed the facial nerve trunk, no paralysis was noted. Hearing test of the ear associated with the tumor, performed ten months before death, revealed a mixed conductive-sensorineural deafness. Surprisingly, the speech reception threshold was 75 dB, with a speech discrimination score of 70%.
在孟菲斯市失聪基金会对颞骨组织病理学进行系统研究期间，我们发现了一个未曾预料到的小的施万细胞瘤，它仅起源于蜗神经，在内耳道内压迫面神经。颞骨的主要病理发现是双侧耳硬化症。蜗神经施万细胞瘤对面神经的压迫在晚期很常见，并会导致下运动神经元性面瘫，但在本病例中，尽管肿瘤生长压迫了面神经干，但未发现面瘫。在患者死亡前十个月对患侧耳朵进行的听力测试显示为混合性传导性 - 感音神经性耳聋。令人惊讶的是，言语接受阈值为75分贝，言语辨别得分是70%。
