Abstract
Adenomatoid odontogenic tumour (AOT) is a rare benign odontogenic tumour characterized by a progressively slow growing pattern and symptomless behavior. The differential diagnosis between AOT and other odontogenic tumours, such as ameloblastoma, should be well conducted in order to avoid extensive ablative surgery. This report presents an unusual case of an 11-year-old male patient who referred to the oral surgeon due to a significant painless gingival swelling in the anterior mandible. A panoramic X-ray revealed a round radiolucid image of an intraosseous lesion with well defined boards and related to the left lateral incisor and left canine. The Computerized Tomography was performed and the sagittal sections revealed a tooth image in contact with the inferior board of the tumour. Additionally, the coronal sections showed the presence of a tooth inside the lesion. Several calcifying nodules could be distinguished within the cystic area. The clinical diagnostic hypothesis was of calcifying epithelium odontogenic tumour but the histological sections were consistent with AOT. The tumour was enucleated under local anesthesia. After one year follow-up there were no signs of reoccurrence. With respect to the distinguishing tumour enlargement and localization in the lower jaw, the reported case is an uncommon example of AOT.
