Dentigerous cyst associated with a supernumerary tooth in the nasal cavity: A case report

There have been some reports concerning supernumerary teeth located in the maxilla; however, eruption into the nasal cavity leading to a dentigerous cyst is quite rare. The authors report a 6-year-old boy who was noticed to have a foreign body in the right nasal cavity during a school physical examination. There was no subjective nasal symptom, such as bleeding or a feeling of rhinostenosis. On radiological examination, a tooth-like radiopaque object was noted beneath the surface of the right nasal floor, and part of a supernumerary tooth in the left maxillary incisor area was also seen. Ectopic supernumerary teeth were diagnosed and removed under general anesthesia. Histopathological examination identified the tooth-like structure as a mature tooth, and the isolated tissue in the nasal cavity was coated by soft tissue, confirmed as a feature of a cyst. Three years after surgery, the patient was doing well and had healed uneventfully.