Abstract
We report the case of a 35-year-old man with a complex odontoma in the posterior wall of the maxillary sinus. He was referred to our department for further investigations of a dentigerous cyst in the left maxillary sinus. On intraoral examination, an erupted left maxillary third molar was observed, with no swelling in the left maxillary molar region. Computed tomography confirmed thickening of the mucous membrane of the maxillary sinus associated with the left maxillary second molar and a spherical high-density shadow in the posterior wall of the left maxillary sinus. The mass was excised from the left maxillary sinus after extracting the left maxillary second molar with the patient under general anesthesia. Histopathological examinations confirmed the diagnosis of complex odontoma. We considered that the complex odontoma was derived from a distomolar germ because of the eruption of the left maxillary third molar. No evidence of postoperative recurrence of the left maxillary sinus has been observed.
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