title: Ameloblastic fibro-odontoma: a diagnostic challenge.
abstract: An 11-year-old girl presented to our department to have a second opinion regarding a lesion involving her left mandible. She had previously undergone several radiographic exams including panoramic, helical, and cone-beam computed tomography. Radiographic examinations revealed a well-defined radiolucent region, which contained an irregular radiopaque mass of 3 cm in diameter, localized to the left angle of the mandible. Our presumptive diagnosis was complex odontoma. Excisional biopsy was performed, and microscopic features showed strands and islands of odontogenic epithelium showing peripheral palisading and loosely arranged central cells, identical to stellate reticulum, embedded in a myxoid cell-rich stroma resembling the dental papilla. Dentin and enamel were also presented. The diagnosis was ameloblastic fibro-odontoma, which is a rare mixed odontogenic tumor, derived from epithelial and ectomesenchymal elements that form the dental tissues.
authors.affiliation: Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisola 9-75, Bauru, São Paulo 17012-901, Brazil.
authors.forename: Elen
authors.initials: E
authors.lastname: de Souza Tolentino
authors.forename: Bruna Stuchi
authors.initials: BS
authors.lastname: Centurion
authors.forename: Marta Cunha
authors.initials: MC
authors.lastname: Lima
authors.forename: Patrícia
authors.initials: P
authors.lastname: Freitas-Faria
authors.forename: Alberto
authors.initials: A
authors.lastname: Consolaro
authors.forename: Eduardo
authors.initials: E
authors.lastname: Sant'ana
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