What is the prevalence of bilateral simultaneous Bell palsy (idiopathic facial paralysis) (IFP)?

Updated: Jun 14, 2019
  • Author: Danette C Taylor, DO, MS, FACN; Chief Editor: Selim R Benbadis, MD  more...
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Though bilateral simultaneous Bell palsy can develop, it is rare. It accounts for only 23% of bilateral facial paralysis and has an occurrence rate that is less than 1% of that for unilateral facial nerve palsy. [30, 31] The majority of patients with bilateral facial palsy have Guillain-Barré syndrome, sarcoidosis, Lyme disease, meningitis (neoplastic or infectious), or bilateral neurofibromas (in patients with neurofibromatosis type 2).

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