A benign odontogenic epithelial neoplasm that histologically mimics the embryonal enamel organ but does not differentiate to the point of forming dental hard tissues; it behaves as a slowly growing expansile radiolucent tumor, occurs most commonly in the posterior regions of the mandible, and has a marked tendency to recur if inadequately excised.
Origin
[ameloblast + G. -oma, tumor]
pigmented ameloblastoma
pituitary ameloblastoma