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Issue link: https://eguideline.guidelinecentral.com/i/1512430
5 Figure 2. Diagnostic Algorithm for CRS Adult with Sinonasal Symptoms Duration ≤4 weeks Duration >4 weeks and <12 weeks "Subacute" Rhinosinusitis Verified with Endoscopy or Imaging? Chronic Rhinosinusitis with Nasal Polups (CRSwNP) Chronic Rhinosinusitis without Nasal Polups (CRSsNP) Consider alternative diagnosis Viral Upper Respiratory Infection versus Acute Bacterial Rhinosinusitis Duration ≥12 weeks NO NO Polyps present? YES YES
