Teeth exceeding the normal dental complement that have erupted into the nasal cavity are a rare pathological entity. This case report describes a female patient with recurrent complaints and fetid discharge from the left nasal cavity. The suspected clinical diagnosis of a supernumerary nasal tooth was confirmed by computed tomography. After endoscopic removal, the tooth was examined using X-ray microtomography and thin-section preparations; these findings are presented for the first time. A literature search identified 25 supernumerary nasal teeth in 23 patients.