[Is it possible to differentiate between odontoameloblastoma and fibro-odontoma? Critical position on basis of 18 cases in DOSAK list].

An attempt was made to differentiate between odontoameloblastoma and ameloblastic fibro-odontoma by means of histological criteria based on 29 cases referred to the DOSAK-bone tumor register. After critical revision 18 appropriate cases have been selected for evaluation. We divided them into 4 odonto-ameloblastomas and 14 ameloblastic fibro-odontomas in accordance with the WHO classification. With respect to localisation, clinical symptoms, radiography, frequency of recurrencies and age no major difference was found between the two "entities". In our sample a decisive histological differentiation was not possible. This supports our hypothesis that there is only one entity.