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What is All of the following are diagnostic criteria of allergic fungal sinusitis {AFS} Except ? and explain in detail?
CT scan shows mucosal thickening with hyperdense areas in fungal sinusitis. Allergic fungal sinusitis is due to the type 1 hypersensitivity reaction to fungal hyphae. It presents with sinonasal polyposis and mucin. (Ref: Textbook of ENT, Diseases of ENT, Dhingra, 7th edition, pg no. 220)