Buchsteiner I, Heermann R, Brandis A, Lenarz T
HNO-Klinik, Medizinischen Hochschule Hannover.
Laryngorhinootologie. 1997 Apr;76(4):252-7. doi: 10.1055/s-2007-997421.
Meningiomas originating in the internal auditory meatus are rare and have been reported in only 12 cases.
We report about another case, which showed primarily the symptoms of sudden hearing loss and diagnostic signs of an intrameatal acoustic neuroma. The ABR interpeak latency IV was prolonged. The tumor was detected by MRI scan with gadolinium contrast enhancement and resembled the features of an intrameatal acoustic neuroma.
The tumor was removed via a middle fossa approach with preservation of hearing and facial nerve function. Histological examination however revealed a meningioma originating from the internal auditory meatus.
Contrast enhancing intrameatal tumors are most often acoustic neuromas. However even despite subtile audiological and neurotological examination and sophisticated imaging techniques they cannot be differentiated clinically from meningiomas at this location. Removal of the intrameatal tumor via a middle fossa approach seems to be the best surgical approach to preserve hearing and facial nerve function.
起源于内听道的脑膜瘤罕见，仅12例有报道。
我们报告另一例，该例主要表现为突发听力丧失症状及内耳道内听神经瘤的诊断体征。听性脑干反应（ABR）波峰间期IV延长。通过钆增强磁共振成像（MRI）扫描检测到肿瘤，其类似内耳道内听神经瘤的特征。
经中颅窝入路切除肿瘤，保留了听力和面神经功能。然而，组织学检查显示为起源于内听道的脑膜瘤。
增强的内耳道内肿瘤最常见的是听神经瘤。然而，即使经过细致的听力学和神经耳科学检查以及先进的成像技术，在此部位临床上仍无法将它们与脑膜瘤区分开来。经中颅窝入路切除内耳道内肿瘤似乎是保留听力和面神经功能的最佳手术方法。
