title: Adenoid cystic carcinoma mimicking an oroantral fistula: a case report.
abstract: Introduction Adenoid cystic carcinoma (ACC) is one of the most frequent malignant salivary gland tumors, which commonly affects the minor salivary glands of the mouth and is rare in the nose and paranasal sinuses. In the maxillary sinus, ACC can mimic inflammatory diseases and has a poor prognosis. Objective To report a case of a 50-year-old man with ACC of the maxillary sinus whose clinical findings in the alveolar ridge mimicked an oroantral fistula. Case Report An excisional biopsy was performed and histopathologic analysis revealed ACC. Lung metastases and residual tumor in the maxillary sinus were detected by imaging methods. In view of the poor general health of the patient, no new surgical intervention was performed and he was only treated by radiotherapy and follow-up. Conclusion Although rare in the maxillary sinus, ACC should be included in the differential diagnosis of lesions affecting this site.
authors.affiliation: Oral Pathology Postgraduate Program, Federal University of Rio Grande do Norte, Natal/RN, Brazil.
authors.forename: Bárbara Vanessa de Brito
authors.initials: BV
authors.lastname: Monteiro
authors.affiliation: Dental School, State University of Paraiba, Araruna/PB, Brazil.
authors.forename: Rafael Grotta
authors.initials: RG
authors.lastname: Grempel
authors.affiliation: Dentistry Postgraduate Program, State University of Paraiba, Campina Grande/PB, Brazil.
authors.forename: Daliana Queiroga de Castro
authors.initials: DQ
authors.lastname: Gomes
authors.affiliation: Dentistry Postgraduate Program, State University of Paraiba, Campina Grande/PB, Brazil.
authors.forename: Gustavo Pina
authors.initials: GP
authors.lastname: Godoy
authors.affiliation: Oral Pathology Postgraduate Program, Federal University of Rio Grande do Norte, Natal/RN, Brazil.
authors.forename: Márcia Cristina da Costa
authors.initials: MC
authors.lastname: Miguel
keywords: adenoid cystic; carcinoma; maxillary sinus; maxillary sinus neoplasms