Introduction: Maxillary sinus osteomas are rare benign tumours with a poorly documented clinical evolution. Their craniofacial localization may be part of a syndrome. We report a case of maxillary sinus osteoma associated to a mucocele and a cyst probably of dental origin, with no sign of associated Gardner syndrome.
Case report: A 52-year-old woman consulted for chronic maxillary sinusitis and an oral vestibular fistula. The CT-scan suggested a mucocele with reactive bone formation. Macroscopically, a pediculated bone tumour was found next to a mucocele, and to a cyst probably of dental origin. The anatomopathological examination led to a diagnosis of cancellous osteoma.
Discussion: Several hypotheses have been made on the etiology of sinus osteomas. When identified, screening for Gardner's syndrome should be implemented because of the associated risk for colic malignancy.
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