Retained tooth in the nasal cavity: a rare cause of nasal congestion.

A 59-year-old man presented with unilateral nasal congestion and discharge. Clinical examination revealed a mass in the floor of the nasal cavity. Sinus CT indicated a retained tooth or a dermoid cyst. It was removed by endoscopic surgery. Histology confirmed the diagnosis of a retained tooth. At follow-up, the patient reported no nasal symptoms. A retained nasal tooth is rare, and the symptoms are variable. It can resemble other diseases such as chronic rhinosinusitis. Surgical removal is recommended to confirm the diagnosis and eliminate symptoms.