Clear cell ameloblastoma--an odontogenic carcinoma.

Two cases of aggressive intraosseous epithelial tumor of the jaws are presented. Both tumors demonstrated an unusual biphasic pattern with areas of acceptable follicular ameloblastoma together with a conspicuous clear-cell component. The clinical course indicates these lesions should be considered as low grade odontogenic carcinomas. Further subclassification according to the World Health Organization classification and the recently proposed modification by Elzay is discussed.