Adenomatoid Odontogenic Tumor: A case report of a seldom seen lesion in the mandible

Abstract

Abstr ID 660 519 ADENOMATOID ODONTOGENIC TUMOR: A CASE REPORT OF A SELDOM SEEN LESION IN THE MANDIBLE S Firat*1 , bilgic bilge2 , K Zamira1, D Misten2 , K Ayfer1 1 Istanbul University, Faculty of Dentistry, Department of Oral Surgery; 2 Istanbul University, Medical Faculty, Department of Pathology, Istanbul University, Faculty of Dentistry, Istanbul, Tu¨rkey E-mail: dtfirat@superonline.com The adenomatoid odontogenic tumors (AOT) make up only 3% of odontogenic tumors. This tumor is a slow growing benign bony lesion of the jaws mostly diagnosed in the second decade of life and there is a female bias in occurrence. Clinically silent, it is often noticed either during routine radiological examinations or by a deformity in the jaws. It originates from epithelial cells of the dental lamina complex or its remnants. Frequently, there is a tooth embedded in the tumor, which most likely is a canine. The tumor is more likely to be found in the maxilla than the mandible. The treatment consists of simple conservative surgical removal of the tumor. Recurrence is uncommon. A case of an adenomatoid odontogenic tumor (AOT) associated with an impacted tooth located in the anterior mandible of a 16-year old male patient is presented. Clinically, there was a missing lower canine and the adjacent teeth were bent towards the missing tooth’s anatomical place. The radiological examinations showed a well-defined radiolucent lesion about 2.5 cm and 2.0 cm and 1.5 cm in size and associated with an impacted tooth. The lesion and the impacted tooth were removed under local anesthesia. Histopathological examination revealed whorls of ovoid-spindle shaped tumoral cells. Within these areas, there were adenoid structures, lined by cuboidal cells. These cells were pozitive for cytokeratinantigen. A homogeneous eosinophilic material was observed in the stroma. Kongo reaction was negative. Focally, solid epithelial islands containing calcification were also seen. No recurrence was observed at the 6-months follow-up. Keywords: Odontogenic tumors; Mandible; Dental lamina complexEACMFS – Abstracts, XVII Congress 2004 251