Atypical plexiform ameloblastoma with dentinoid: adenoid ameloblastoma with dentinoid

In this study, we report a tumor that resembled previously reported uncommo n tumors histologically similar to ameloblastoma or adenomatoid odontogenic tumor (AOT), showing the formation of hard tissue. We evaluated the histol ogical characteristics by reviewing the literature. The patient was a 19-ye ar old male. The lesion was located from the canine to third molar in the r ight mandible and was unicystic with a comparatively clear demarcation, The tumor tissue was cystic overall, showing multiple formation of small and l arge cysts. The tumor tissue resembled a variant form of plexiform amelobla stoma, Formation of dentin and dentinoid was observed in the tumor stroma, whereas formation of enamel was not observed. Very few cases of a variant f orm of ameloblastoma that shows formation of dentinoid have been reported, and the histological picture in this study closely resembled previously rep orted "adenoid ameloblastoma with dentinoid".