title: Maxillary ameloblastic fibroma: a case report.
abstract: Ameloblastic fibroma is a relatively rare benign odontogenic tumor in which both the epithelial and ectomesenchymal components are neoplastic. An 8-year-old Caucasian boy was referred to the dentist for evaluation of failed eruption of the maxillary left first molar. The panoramic radiograph showed a well-circumscribed unilocular radiolucency involving an unerupted maxillary left first permanent molar. The lesion was enucleated and the material was sent for histopathologic examination. Microscopically, it was composed by cords and islands of odontogenic epithelium in a myxoid cell-rich stroma that closely resemble the dental papilla with histopathological diagnosis of ameloblastic fibroma. After 24 months of follow-up no recurrence was observed and the maxillary left first molar erupted spontaneously through the buccal mucosa and was aligned with a fixed orthodontic appliance. This case emphasized the importance of careful differential diagnosis of intraosseous oral lesions and reported a rarity of the lesion and its atypical location.
authors.affiliation: Department of Pathology, Fluminense Federal University, Niterói, RJ, Brazil.
authors.forename: Daniela Otero Pereira da
authors.initials: DO
authors.lastname: Costa
authors.forename: Adriana Terezinha Neves Novellino
authors.initials: AT
authors.lastname: Alves
authors.forename: Mônica Diuna
authors.initials: MD
authors.lastname: Calasans-Maia
authors.forename: Ricardo Lopes da
authors.initials: RL
authors.lastname: Cruz
authors.forename: Simone de Queiroz Chaves
authors.initials: Sde Q
authors.lastname: Lourenço
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D005350:Fibroma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008441:Maxillary Neoplasms / Q000150:complications / Q000473:pathology* / Q000601:surgery; D008963:Molar / Q000473:pathology; D009808:Odontogenic Tumors / Q000150:complications* / Q000601:surgery; D014097:Tooth, Unerupted / Q000209:etiology*