Abstract
Four subtypes of ameloblastoma (solid/multicystic type, extraosseous/peripheral type, desmoplastic type, unicystic type) that were described in the 2005 WHO classification of odontogenic tumors are associated with their biological behaviors, which underlines the importance of histopathological diagnosis of ameloblastoma in the determination of therapeutic strategy. The distinction of odontogenic carcinomas from ameloblastoma is made by recognizing various histopathological features suggestive of malignancy such as cellular atypia. Odontogenic carcinoma contains several entities that are classified according to the histological features and clinical history. Because of their rarity, clinical differences between behaviors of odontogenic carcinoma subtypes have not been clearly demonstrated. More data should be collected to assess the clinical significance of the classification of odontogenic carcinoma.
