Fungal sinusitis.

Fungal disease of the paranasal sinuses is an important and underrecognized entity that affects both immunocompromised and previously healthy subjects. The spectrum of disease includes fungal balls, allergic fungal sinusitis, chronic indolent fungal sinusitis, and invasive fungal sinusitis. The radiologic, immunologic, and histopathologic findings are unique for each of these conditions. The surgical and medical management of these diseases is discussed and four case studies are presented.