What is the definition of acute rhinosinusitis (RS)?

Updated: Mar 01, 2018
  • Author: Itzhak Brook, MD, MSc; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Many classifications, both clinical and radiological, have been proposed in the literature to define acute sinusitis. Although no consensus on the precise definition currently exists subacute sinusitis represents a temporal progression of symptoms for 4-12 weeks. Recurrent acute sinusitis is diagnosed when 2-4 episodes of infection occur per year with at least 8 weeks between episodes and, as in acute sinusitis, the sinus mucosa completely normalizes between attacks. Chronic sinusitis is the persistence of insidious symptomatology beyond 12 weeks, with or without acute exacerbations. [6]


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