Sinus fungal balls are a type of sinusitis, an infection of the sinuses. They occur when a fungus grows into a densely packed ball inside one of your sinuses, most commonly the maxillary sinus.

When your maxillary sinuses are congested, you may feel painful pressure over your cheeks, in your upper jaw, or in your teeth. A maxillary sinus massage may help ease congestion and pressure in ...

When the congestion is in the maxillary sinuses, tooth pain can occur. This pair of sinuses sit just above the upper molars in the cheekbones.

These are the stages used for paranasal sinus and nasal cavity cancer: Stage 0 (carcinoma in situ): Abnormal cells are in the innermost lining of the maxillary sinus, nasal cavity, or ethmoid sinus.