An<unk>  is a fibroma of the<unk>  tissue, that is, an odontogenic tumor arising from the enamel organ or dental lamina. It may be either truly neoplastic or merely hamartomatous (an odontoma). In neoplastic cases, it may be labeled an<unk> rcoma in accord with the terminological distinction that reserves the word fibroma for benign tumors and assigns the word fibrosarcoma to malignant ones. It is more common in the first and second decades of life, when odontogenesis is ongoing, than in later decades. In 50% of cases an unerupted tooth is involved. Histopathology alone is usually not enough to differentiate neoplastic cases from hamartomatous ones, because the histology is very similar. Other clinical and radiographic clues are used to narrow the diagnosis.
Ameloblastic fibroma
Collagenous fibroma
Sclerotic fibroma
Juvenile hyaline fibromatosis
Cellular angiofibroma
Solitary fibrous tumor
Angiomyofibroblastoma
Desmoplastic fibroma