{"references": ["1. Prakash R, Shahid SM, Raj H, Anil KS. Cementoossifying fibroma: A diagnostic dilemma. Int J Oral Care Res 2021;9:468. 2. Rangil J S , Silvestre F J ,Bernal J. Cemento-ossifying fibroma of the mandible: Presentation of a case and review of the literature J Clin Exp Dent. 2011;3(1):e66- 9. 3. Mahato B, Mandal S, Ray JG, et al. Central cementoossifying fibroma: a case report. MOJ Clin Med Case Rep. 2015;3(2):214\u2012216. DOI: 10.15406/mojcr. 2015.03.00061 4. Kumar S, Dorairaju P, Abirami V, et al. Cemento- Ossifying Fibroma of Upper Lip in a Female Child. Cureus. 2021;13(4):e14692. DOI 10.7759/cureus. 14692 5. Sridevi U, Jain A, Turagam N, Prasad MD. Cemento- Ossifying Fibroma: A Case Report. Adv Cancer Prev. 2016;1:111. doi: 10.4172/2472-0429.1000111 6. Tapas K. Bala, Soni S, Dayal P, Ghosh I. Cementoo s s i f y i n g fi b r o m a o f t h e m a n d i b l e A clinicopathological report. Saudi Med J. 2017; 38(5): 541-545. doi: 10.15537/smj.2017.5.15643 7. Trijolet JP, Parmentier J, Surya FD, Gogaa N, Mejeanc B. Laure. Cemento-ossifying fibroma of the mandible. Published in science direct in 2010 8. Sarwar H G, Jindal M K, Ahmad S S. Cementoossifying fibroma-a rare case. J Indian Soc Pedod Prev Dent. 2008;26:128. 9. Grewal M, Gautam S, Tanwar R, Saini N. Cemento ossifying fibroma of maxilla: An unusual case report. J Dent Res Rev. 2020;7:206-9. 10. Gumru B, Idman E , Erdem NF , Gumuser Z , Aksakalli FN. Cemento-ossifying fibroma \u2013 a case report. Clin Exp Health Sci. 2020;10: 468-472."]}

Cemento-ossifying fibroma (COF) is a rare benign fibro-osseous neoplasm commonly involving the jaws. These lesions are predominantly seen in between 2nd to 4th decades of life more commonly in women than men. It's a slow growing mass attain a larger size with passage of time and causes facial deformity if left untreated. We are reporting a case of COF in 50yr old male with huge swelling over a period of 2 years involving the left side of the lower jaw crossing the midline with gross facial deformity.