Cemento-ossifying fibroma (COF) is a benign fibro osseous lesion of the jaws which has been described as a demarcated or rarely encapsulated neoplasm consisting of fibrous tissue and varying amounts of mineralized material resembling bone and/or cementum (Dinkar et al. in IJDA 2(4):45-47, 2010). Majority of lesions occur in the mandible and only few cases of COFs of the maxillary sinus and bilateral COFs of the mandible have been reported in literature (Dinkar et al. in IJDA 2(4):45-47, 2010; Tamiolakis et al. in Acta Stomatol Croat 39(3):319-321, 2005; Hamner et al. in Oral Surg Oral Med Oral Pathol 26(4):579-587, 1968; Gunaseelan et al. in Oral Med Oral Pathol Oral Radiol Endod 104:e21-e25, 2007). These lesions have a very low recurrence rate (Ertug et al. in Quintessence Int 35(10):808-810, 2004) and are generally treated by enucleation. In this paper we present a rare case of COF occurring in both the maxilla and mandible of the same patient. Only one such case (Takeda and Fujioka in Int J Oral Maxillofac Surg 16(3):368-371, 1987) has been reported in literature so far.
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