Concurrent Monoclonal Gammopathy of Undetermined Significance in a Patient With Maxillary Sinus Fungus Ball.

Fungus ball is a common disease encountered in rhinology departments. As it usually affects immunocompetent patients, other systemic diseases occurring concurrently with fungus ball have not been reported often. Recently, we encountered a patient who was diagnosed with fungus ball in the maxillary sinus and underwent endoscopic sinus surgery.