What is the minimum diagnostic criteria for 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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The minimum diagnostic criteria include paralysis or paresis of all muscle groups on one side of the face, sudden onset, and absence of central nervous system (CNS) disease. Note that the diagnosis of IFP can be made only after other causes of acute peripheral palsy have been excluded. (See DDx.)

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