All of the following are diagnostic criteria of Allergic Fungal Sinusitis (AFS), EXCEPT:: (A) Areas of High Attenuation on CT scan, (B) Orbital invasion, (C) Allergic Eosinophilic mucin, (D) Type I Hypersensitivity
Answer is B. The diagnostic criteria for allergic fungal sinusitis (AFS) are the presence of characteristic allergic mucin, type I hypersensitivity (eosinophilic-lymphocytic inflammation), absence of fungal invasion, immuno-compromised individuals and radiological confirmation (areas of high attenuation on CT scan).