Wigand M E
HNO. 1981 Apr;29(4):140-2.
A 28-year-old patient developed severe unilateral sensorineural deafness and vertigo. A tumor of the cerebello-pontine angle was assumed on the basis of a computed tomogram, and a translabyrinthine exposure of the internal auditory canal was performed. A histologically verified neurinoma was found, but in the labyrinthine vestibule. Although the tumor extended into the horizontal semicircular canal, both the internal auditory canal and the cerebello-pontine angle were tumor-free. The labyrinthine origin of a neurinoma has relevant implications for the differential diagnosis of progressive sensorineural deafness. As such, the filling of the internal auditory canal with contrast media does not preclude the presence of a tumor at the eighth nerve and requires additional precision tomography of the labyrinth.
一名28岁患者出现严重的单侧感音神经性耳聋和眩晕。根据计算机断层扫描结果推测为桥小脑角肿瘤，并对内耳道进行了经迷路暴露手术。发现了组织学证实的神经鞘瘤，但位于迷路前庭。尽管肿瘤延伸至水平半规管，但内耳道和桥小脑角均无肿瘤。神经鞘瘤的迷路起源对进行性感音神经性耳聋的鉴别诊断具有重要意义。因此，用造影剂填充内耳道并不能排除第八神经存在肿瘤的可能性，需要对迷路进行额外的精确断层扫描。
