title: Associated aneurysmal bone cyst and cemento-osseous dysplasia: a case report and review of the literature.
abstract: The purpose of this case report is to describe a previously unpublished association between focal cemento-osseous dysplasia (FCOD) and an aneurysmal bone cyst (ABC) and review the literature with regard to associated benign fibro-osseous lesions and cysts. A 41-year-old woman without a history of trauma presented with asymptomatic swelling in the right side of the mandible. Radiographs of the region revealed a unilocular radiolucent area with radiopaque foci. After aspiration of the lesion was positive for serosanguineous fluid, complete excision of the lesion was performed. Microscopic examination revealed a hybrid ABC and FCOD. The 12-month follow-up showed significant bone repair and no signs of recurrence. A review of the English-language literature from 1980 to 2012 revealed 1 retrospective study, 4 case series, and 18 single-case reports on the topic of cemento-osseous dysplasias, fibro-osseous lesions, and aneurysmal bone cysts. Of 59 cases, none reported an association between an ABC and FCOD. Although fibro-osseous lesions do not require intervention, surgical excision is recommended when they are associated with cysts. This case, in which an ABC and FCOD were associated, reinforces the need for a careful diagnostic process in radiographically mixed lesions that respond positively to aspiration biopsy.
authors.forename: Willian Pecin
authors.initials: WP
authors.lastname: Jacomacci
authors.forename: João Paulo
authors.initials: JP
authors.lastname: Veloso Perdigão
authors.forename: Vanessa Cristina
authors.initials: VC
authors.lastname: Veltrini
authors.forename: Gustavo Jacobucci
authors.initials: GJ
authors.lastname: Farah
authors.forename: Elen Souza
authors.initials: ES
authors.lastname: Tolentino
authors.forename: Lilian Cristina
authors.initials: LC
authors.lastname: Vessoni Iwaki
authors.forename: Liogi
authors.initials: L
authors.lastname: Iwaki Filho
mesh_terms: D000328:Adult; D017824:Bone Cysts, Aneurysmal / Q000150:complications* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D005260:Female; D005357:Fibrous Dysplasia of Bone / Q000150:complications* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D006801:Humans; D008336:Mandibular Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D010019:Osteomyelitis / Q000150:complications* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D011861:Radiography, Dental
keywords: aneurysmal bone cyst; fibro-osseous lesions; focal cemento-osseous dysplasia; hybrid lesions