Rhinosinusitis laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Dima Nimri, M.D. [2]

Overview

There are several lab findings that can be done when suspecting rhinosinusitis, but these findings are nonspecific.

Laboratory Findings

The following laboratory tests can be done when suspecting rhinosinusitis, but a positive result is unspecific:

• Complete blood count (CBC), to detect for the presence of an infection
• Erythrocyte sedimentation rate (ESR)
• Sweat chloride test, to exclude cystic fibrosis
• Serum immunoglobulins, to exclude underlying immunodeficiency
• Allergy testing (Radio-Allergo-sorbent Test (RAST)) may be done in cases of chronic sinusitis or acute recurrent sinusitis