Horizontal (A) and sagittal cross section (B) cone-beam computed tomography showing multilocular well-circumscribed radiolucent lesion containing scattered calcifications. The calcified body was detected as no signal on both the STIR and T1-weighted images.įigure 2. Magnetic resonance imaging showed heterogenoushyperintensity on short tau inversion recovery (STIR) images and intermediate intensity on T1-weighted images. Axial and coronal views revealed no evident buccolingual expansion of the cortex, although thinning of the cortex on the lingual side was observed. Cone-beam computed tomography images showed a multilocular well-circumscribed radiolucent lesion containing several small scattered calcifications on the right side of the mandible. The first molar was impacted by the lesion. There was no history of local trauma or infection.Ī panoramic radiograph showed a well-defined multilocular radiolucent lesion extending from the right first molar to the mandibular ramus, containing radiopaque foci. An oral examination disclosed no expansion of the right mandible, and the gingiva mucosa in the lesion appeared normal. There was no gingival swelling or redness on his first molar lesion. The results of the extraoral examination were normal. We preserved his unerupted tooth without recurrence over a 2-year follow-up.Ī 9-year-old Japanese boy was referred to Okayama University Hospital in December 2013 for the evaluation of an unerupted tooth in his right lower mandible as indicated by his family dentist.
Here we report a new case of AFO in a young boy. Radiographically, AFOs exhibit well-defined radiolucency with several levels of radiopacity depending on the extent of mineralization. The most characteristic clinical feature of AFOs is tooth eruption and swelling of the jaw. reported that AFOs are more common among males than female. The WHO classification notes that there are no sex differences in AFO patients.
AFOs usually occurs at an early life stage, and thus the patient's age is an important factor in the diagnosis of AFO. In its 2005 classification of odontogenic tumors, the World Health Organization (WHO) classifies AFO as odontogenic epithelium with odontogenic ectomesenchyme, with or without hard tissue formation. Hooker reported the first case of AFO in 1967. Ameloblastic fibro-odontoma (AFO) is a rare, benign mixed odontogenic tumor that account for 1%-3% of all odontogenic tumors.
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