Clinical case of keratinizing and calcifying odontogenic epithelial tumor in the upper jaw.

In recent years, there have been published clinical reports dealing with cysts or tumors of the odontogenic character the extract of which revealed pathologic keratinizing or calcifying changes in the light of histopathologic examination Cl, 6, 8, 9, 10, 11, 12). These pathologic changes are said to give quite different histopathologic findings from those of the radicular cyst, follicular cyst or cystic ameloblastoma . The case of an upper tumor to be described here is one which was diagnosed as a clinical osteofibroma but, upon its histopathologic examination , the extract was found to be what could be termed as keratinizing and calcifying odontogenic epithelial tumor .