All of the following are diagnostic criteria of allergic Fungal sinusitis except:
Allergic fugal sinusitis is a non invasive form of fungal sinusitis as such orbital invasion is not its feature. Ref Pattern's Allergic Disease 6/e,p 778.
Areas of High Attuenuation on CT scan
Orbital invasion
Allergic eosinophilic mucin
Type 1 Hypersensitivity
Nose and paranasal sinuses