A case of adenomatoid odontogenic tumor extending widely in the maxillary sinus

Abstract

Adenomatoid odontogenic tumor (AOT) is an uncommon odontogenic lesion characterized histologically by ductal structures of epithelial cells and foci of calcification. Typically, these lesions arise in the lateral incisor/canine region in alveolar bone of the maxilla. Rarely, the lesion exhibits aggressive behavior, such as becoming large or extending into the paranasal sinuses. This article describes a case of AOT that extended widely in the maxillary sinus.
A 18-year-old woman was referred to our clinic for evaluation of a mixed radiolucent-radiopaque lesion with a well defined border in the right maxillary sinus. A computerized tomographic evaluation demonstrated a defined large lesion that had extended widely in the right maxillary sinus, with thinning the cortical bone of the maxilla. The lesion was associated with an unerupted tooth on the corresponding region of the nasal cavity.
An incisional biopsy was performed under local anesthesia. The pathological diagnosis was AOT. Surgery was performed with the patient under general anesthesia. The tumor was enucleated completely via an intraoral approach. There has been no recurrence as of 5 months after surgery.