eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2016-12-22 9 3 1157 1159 10.13005/bpj/1063 10740 article Behroz Barati 1 Mahboobe Asadi 1 Faculty of medicine, Department of otolaryngology and head and neck surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Mastoid osteomas are rare asymptomaticlesion. When symptomsare present, surgical resection is the treatment of choice.Case report: The authors report a case of mastoid osteoma in a 56-year old woman. Computed tomography performed because of a retroauricular mass identified a large osteoma of the mastoid. Surgery carried out because of conductive hearing loss.Results: conductive hearing loss is an indication for surgical management of mastoid osteoma.Conclusion: mastoid osteoma is rare and surgery indicated in symptomatic cases. https://biomedpharmajournal.org/vol9no3/mastoid-osteoma-report-of-an-unusual-case/ osteoma mastoid