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

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: [email protected] 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 25

Acral myxoinflammatory fibrablastic sarcoma: Report of six cases

Acral myxoinfl a minatory fibroblastic sarcoma was first described in 1998. The tumor typically involves distal extremities; especially fingers and toes. It is usually located in subcutaneous tissue. The age range is broad (mean age 40). The size of tumor varies between 1-8 cm. Microscopically, itnyxold and hyaline zones are characteristic. Inflammatory cells are abundant and there are large cells resembling Reed Sternberg or ganglion cells and multi yactoilated cells having lipoblast-like appearance

ADENOMATOID ODONTOGENIC TUMOR ASSOCIATED WITH CALCIFYING EPITHELIAL ODONTOGENIC TUMOR: A CASE REPORT

Adenomatoid Odontogenic Tumors (AOT) make up 3% of all odontogenic tumors. The most conspieuous feature of this tumor is nodules or wholes of spindle-shaped of cuboidal epithelial cells. Within these cellular areas, ductiform structures formed by cuboidal or low columnar cells may be identified. Between the epithelial cells, there apear some focl of calcification mimieing cellular featurs of Calcifying Epithelial Odontogenic Tumor (CEOT). However, combination of cellular features of these two different odontonogenic tumors is a very rare finding. Here, a case of a so-called Combined Epithelial Odontogenic Tumor, associated with an impacted mandibular canine, is presented in a 16 year-old white male. Under local anesthesia, the tumor and the tooth were removed. The histopathological examination revealed that the tumor to be consisting primarily of AOT with some areas of CEOT. Healing was uneventful No recurrence was detected at two years time period