周围性面瘫的原因很多,通常多归咎于“受凉”或感染,对肿瘤一因很少注意。往昔认为,由肿瘤引起者只占5%(Shambaugh,1972),近谓,仅次于贝尔氏与外伤性面瘫而高达12.5%。面神经本身肿瘤所致面瘫多于外来肿瘤引起者。在其本身肿瘤中,绝大多数为良性,尤以神经鞘膜或纤维瘤最常见。外露于鼓室的该瘤易诊断,而鼓膜完整者则常误诊 There are many causes of peripheral facial paralysis, which are often attributed to “coldness” or infection. Little attention has been paid to tumors. In the past, only 5% of patients were caused by tumors (Shambaugh, 1972), which is nearly as high as 12.5% ​​after Bell and traumatic facial paralysis. Facial nerves caused by tumors of the facial nerve are more than those caused by foreign tumors. In their own tumors, the vast majority are benign, especially nerve sheath or fibroids are the most common. The tumor exposed to the tympanum is easy to diagnose, while the tympanic membrane is often misdiagnosed.