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Allergy, Asthma & Clinical Immunology
Table 7 CRS Diagnosis Requires the Presence of at Least 2 Major Symptoms*
Canadian clinical practice guidelines for acute and chronic rhinosinusitis
Purulent anterior/posterior nasal
rainage (discharge may be nonpurulent, nondiscolored)
*A diagnosis requires at least 2 CPODS, present for 8 to 12 weeks, plus evidence of inflammation of the paranasal sinusus or nasal mucosa.
CRS is diagnosed on clinical grounds but must be confirmed with at least 1 objective finding on endoscopy or CT scan.
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