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ameloblastic fibro-odontoma
Wednesday 21 May 2008
Definition : Ameloblastic fibro-odontoma (AFO) is a quite rare, mixed odontogenic tumour generally seen in the early stages of life. Ameloblastic fibro-odontomas usually present in young adults in the posterior jaws.
Radiographically they may be unilocular or multilocular but are well circumscribed with a corticated border with a mixed radiolucency/radio-opacity appearance.
Microscopy
numerous cords and follicles of odontogenic epithelium exhibiting peripheral ameloblast-like cells within primitive ectomesenchymal tissue
Hard tissue examination exhibited conglomerate mass of enamel and dentine arranged in a disorganized pattern and in close relationship to the ameloblastic epithelium
follicles of amelobalstic epithelium within a primitive ectomesenchyme
island and cords of cuboidal epithelium
myxoid background
Mineralization is seen with enamel, dentin and cementum formation.
- The mineralized material may be organized to resemble poorly formed teeth.
- enamel and dentine in close relationship with the ameloblastic epithelium.
These lesions are treated conservatively with simple curettage and recurrences are rare.
Ameloblastic fibro-odontoma has features of ameloblastic fibroma but in addition they have enamel and dentin deposition.
Ameloblastic fibro-dentinoma is best regard as a variant of ameloblastic fibro-odontoma and has only dentin deposition.
See also
ameloblastic tumors
odontogenic tumors
odontogenic cysts
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