Abstract
The adenomatoid odontogenic tumor has been thought to be rare, but the number of reported cases is gradually increasing. However, various things concerning it have not been clarified in detail. A case of adenomatoid odontogenic tumor in a 23-year-old female was experienced. Radiographic examination revealed a cystic lesion with an unerupted canine in the incisal region of the mandible and the lesion was clinically diagnosed as a dentigerous cyst in the mandibular anterior region. The lesion was extirpated and the pathological diagnosis was adenomatoid odontogenic tumor. Histological examination revealed many cysts, duct-like structures lined with columnar epithelial cells, some deposition of eosinophilic material, and a few calcified masses.
Of the 152 cases of the adenomatoid odontogenic tumors reported in Japan, 66 were in the mandible. They were clinicostatistically reviewed. Fifty-one were in females, and the lesion was found most frequently at the age of 10 to 19 years. The most frequent region was from the lower incisal portion to the lower molar portion and the most frequent preoperative diagnosis was dentigerous cyst. Radiographically, calcification was found in 36 cases accounting for more than half of all the cases.
