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Ameloblastic fibroma.

Nelson BL, Folk GS - Head Neck Pathol (2008)

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomic Pathology, Naval Medical Center, San Diego, 34800 Bob Wilson Drive, San Diego, CA 92134-5000, USA. Brenda.nelson@med.navy.mil

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An 18-year-old male presented for a routine dental examination with an incidental finding in the left posterior maxilla... Imaging studies revealed a well-circumscribed, unilocular radiolucency preventing eruption of the left maxillary second molar and displacing it in a superior and posterior direction, into the maxillary sinus (Fig.  1)... The area was treated with thorough curettage and the associated maxillary second molar was extracted... The mesenchymal component contained evenly distributed plump ovoid and stellate cells in a loose myxoid to predominantly eosinophilic matrix, resembling the primitive dental papilla... Mitotic activity was not appreciated... Ameloblastic fibromas are neoplasms of odontogenic epithelium and mesenchymal tissues, and as such are categorized as mixed odontogenic tumors... Other mixed odontogenic lesions, such as ameloblastic fibro-odontomas and odontomas share some clinical, radiographic and histologic similarities with ameloblastic fibroma... In the past, it was suggested that these lesions represented a spectrum of a single entity, with ameloblastic fibromas, the least differentiated of the tumors, maturing and developing into ameloblastic fibro-odontomas and later odontomas... Patients often present with painless swelling of the jaw and the lesion may affect the normal eruption of teeth in the area... An impacted tooth may be associated with the tumor in approximately three quarters of the cases... Some lesions are asymptomatic, with up to 20% of cases initially detected upon review of routine dental radiographs... Finally, immunohistochemistry generally does not aid in differentiating ameloblastic fibroma from other mixed odontogenic tumors.

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Well-defined unilocular radiolucency prohibiting the eruption of the left maxillary second molar
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Fig1: Well-defined unilocular radiolucency prohibiting the eruption of the left maxillary second molar

Mentions: Imaging studies revealed a well-circumscribed, unilocular radiolucency preventing eruption of the left maxillary second molar and displacing it in a superior and posterior direction, into the maxillary sinus (Fig. 1).Fig. 1


Ameloblastic fibroma.

Nelson BL, Folk GS - Head Neck Pathol (2008)

Well-defined unilocular radiolucency prohibiting the eruption of the left maxillary second molar
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2807540&req=5

Fig1: Well-defined unilocular radiolucency prohibiting the eruption of the left maxillary second molar
Mentions: Imaging studies revealed a well-circumscribed, unilocular radiolucency preventing eruption of the left maxillary second molar and displacing it in a superior and posterior direction, into the maxillary sinus (Fig. 1).Fig. 1

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomic Pathology, Naval Medical Center, San Diego, 34800 Bob Wilson Drive, San Diego, CA 92134-5000, USA. Brenda.nelson@med.navy.mil

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

An 18-year-old male presented for a routine dental examination with an incidental finding in the left posterior maxilla... Imaging studies revealed a well-circumscribed, unilocular radiolucency preventing eruption of the left maxillary second molar and displacing it in a superior and posterior direction, into the maxillary sinus (Fig.  1)... The area was treated with thorough curettage and the associated maxillary second molar was extracted... The mesenchymal component contained evenly distributed plump ovoid and stellate cells in a loose myxoid to predominantly eosinophilic matrix, resembling the primitive dental papilla... Mitotic activity was not appreciated... Ameloblastic fibromas are neoplasms of odontogenic epithelium and mesenchymal tissues, and as such are categorized as mixed odontogenic tumors... Other mixed odontogenic lesions, such as ameloblastic fibro-odontomas and odontomas share some clinical, radiographic and histologic similarities with ameloblastic fibroma... In the past, it was suggested that these lesions represented a spectrum of a single entity, with ameloblastic fibromas, the least differentiated of the tumors, maturing and developing into ameloblastic fibro-odontomas and later odontomas... Patients often present with painless swelling of the jaw and the lesion may affect the normal eruption of teeth in the area... An impacted tooth may be associated with the tumor in approximately three quarters of the cases... Some lesions are asymptomatic, with up to 20% of cases initially detected upon review of routine dental radiographs... Finally, immunohistochemistry generally does not aid in differentiating ameloblastic fibroma from other mixed odontogenic tumors.

Show MeSH
Related in: MedlinePlus