Tehran University of Medical Sciences Journal of Craniomaxillofacial Research 2345-5489 5 2 2018 06 15 91 94 EN Mohammadsadegh Safarian Department of Oral & Maxillofacial Surgery, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Samira Derakhshan Department of Oral and Maxillofacial Pathology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Monir Moradzadeh Khiavi Department of Oral and Maxillofacial Pathology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Arzhang Baghi Dental Student, School of Dentistry, Tehran University of Medical Sciences, International Campus, Tehran, Iran. 2018 08 17 2018 08 18 Osteoma is a benign osteogenic neoplasm composed of mature compact or cancellous bone and classified as central, peripheral or extra-skeletal. Peripheral type of osteoma is rare. The maxillary sinuses are the most common sites of involvement. It is rare in jaws. Peripheral ossifying fibroma is a reactive lesion of oral tissues, associated with local factors such as trauma or irritation factors. In this paper, we presented the first case of solitary peripheral osteoma associated with peripheral ossifying fibroma. The lesion was located in the lingual  surface of the left posterior area of mandible in a 32-year-old woman. The lesion was removed surgically, and no recurrence has been observed after six months follow up. https://jcr.tums.ac.ir/index.php/jcr/article/view/232 https://jcr.tums.ac.ir/index.php/jcr/article/download/232/231