would show that there is no I hydraulic effect in the expanded cortex, as might be seen in a dentigerous cyst. Further, dentigerous cysts and amelo- blastomas have a great tendency to resorb the roots of erupted teeth in the region of the lesion. We found no men- tion of root resorption in association with ameloblastic fibroma. Although solitary lesions not associated with impacted or unerupted teeth do occur, their radiologic features have not been well described.