Facial nerve schwannoma is a rare entity and whether considering patients with tumors of the cerebellopontine angle (CPA) or those with facial nerve palsies, there are many other more likely diagnoses. Even among the small population of patients with benign tumors of the facial nerve, meningioma, hemangioma, neurofibroma, or other extremely rare entities (eg, facial nerve perineurioma) are competing diagnoses.¹ Noninvasive diagnosis is made by a combination of clinical and imaging features, which rely on the finding that facial nerve schwannoma typically present with facial asymmetry and a radiographically apparent tumor along the nerve's path, often with contrast enhancing soft tissue along the osseous canal of the nerve through the temporal bone. This is in contrast to vestibular schwannoma, a much more common CPA tumor, which typically present with vestibulocochlear symptoms and will mostly be confined to the prepontine or canalicular spaces.

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评论：解剖节段介入对面神经鞘膜瘤立体定向放射外科的影响：一项国际多中心队列研究。

面神经神经鞘瘤是一种罕见的实体，无论考虑患有小桥脑角（CPA）肿瘤还是面神经麻痹的患者，还有许多其他更可能的诊断方法。甚至在少数患有面神经良性肿瘤的患者中，脑膜瘤，血管瘤，神经纤维瘤或其他极为罕见的实体（例如面神经皮神经瘤）也在竞争诊断。¹非侵入性诊断是通过结合临床和影像学特征做出的，这些发现依赖于以下发现：面神经神经鞘瘤通常表现为面部不对称，并且沿神经路径存在放射学上明显的肿瘤，通常在沿骨骼的骨管增强了软组织的对比度神经通过颞骨。这与前庭神经鞘瘤相反，前庭神经鞘瘤是一种更为常见的CPA肿瘤，通常表现为前庭球静脉症状，并且大多数情况下将局限于前额叶或小管间隙。