2002; 549: 4-30. 10.1080/000164802760370736 12 Alghamdi M, Strenger T, Thoelken R, Schaller T, Zenk J. Facial Nerve Palsy, When should we be alarmed: a case report of facial nerve paralysis caused by occult malignancy and review of the literature. CONCLUSION We describe a rare case of MPNST of the facial nerve involving the temporal bone in a woman presenting with a progressive and chronic facial paralysis initially misdiagnosed as Bell's palsy. INTRODUCTION Bell's palsy is an idiopathic peripheral palsy of the facial nerve that commonly presents as unilateral facial muscle weakness.[1] The facial nerve is responsible for the muscles of facial expression, taste to anterior 2/3 of the tongue, and parasympathetic supply to salivary and lacrimal glands.[2] Bell's palsy accounts for 60-75% of unilateral facial paralysis cases with an annual incidence of 15 to 30 cases per 100,000 people.[3], [4] Although rare, malignant tumors can also affect the facial nerve with similar presentation as Bell's palsy. [Extracted from the article]
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