Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 57 7 2020 01 25 456 460 Azadehzeinab Titidej Department of Oral and Maxillofacial Pathology, School of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran. Maryam Jolehar Department of Oral and Maxillofacial Pathology, School of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran. 2019 04 16 2019 10 02 Desmoplastic fibroma is a rare, benign fibrous tumor of bone which is locally aggressive. The mandible is the most prevalent affected of the facial bones. Nevertheless, reports of desmoplastic fibroma affecting the mandible are seldom in the literature. It causes bone destruction and has a high tendency for local recurrence. In this case report, we report a case of desmoplastic fibroma which is located in mandibular angle and extended to coronoid process, in 20-year-old female patient. https://acta.tums.ac.ir/index.php/acta/article/view/7837 https://acta.tums.ac.ir/index.php/acta/article/download/7837/5291