Which histologic findings are characteristics of allergic fungal sinusitis (AFS)?

Updated: Apr 13, 2020
  • Author: John E McClay, MD; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Allergic fungal mucin normally is first encountered at surgery. Therefore, recognition of its presence is the initial step in establishing an accurate diagnosis of allergic fungal sinusitis (AFS). Examination of mucosa and polyps obtained from involved paranasal sinuses reveals findings consistent with the inflammation of a chronic inflammatory process and should be performed to exclude fungal invasion.

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