[header] How to treat a fungal infection of the sinus cavity [title] Track the progress of the fungus. [step] Aspergillus fungi will first infect the paranasal sinuses and airways. It may then progress down into the lung tissue, or remain in the sinuses. 
At this time, the fungi will form a fungus ball, or aspergilloma, which is the hallmark of this infection. [substeps] A fungus ball is a mass of fungi that form together.