European Annals of Otorhinolaryngology, Head and Neck diseases (2011) 128, 30—33 CLINICAL COMMENTARY Cemento-ossifying fibroma of the mandible J.-P. Trijolet a,b , J. Parmentier a,b , F. Sury a,b , D. Goga a,b , N. Mejean c , B. Laure a,*,b a Service de chirurgie maxillofaciale, CHU Trousseau, route de Loches, 37044 Tours cedex, France b Faculté de médecine de Tours, université Franc ¸ois-Rabelais, 2 bis, boulevard Tonnellé, 37000 Tours, France c Service de radiologie pédiatrique, CHU de Dijon, boulevard du Maréchal-de-Lattre-de-Tassigny, BP 77908, 21079 Dijon cedex, France Available online 17 September 2010 KEYWORDS Bone neoplasm; Ossifying fibroma; Mandible Summary Introduction: Cemento-ossifying fibroma is a rare benign tumor most often discovered inciden- tally. Case report: A 72-year-old patient was referred for a subclinical lesion of the mandible. The orthopantomogram showed a well-circumscribed radiolucent osteolytic image, 1 cm in diame- ter, on the mandibular angle. On CT, the single lesion had a tissue aspect with a peripheral halo without enhancement after contrast injection. A cortical lacuna on the lingual side was noted. Surgical enucleation of the lesion was performed. The pathological examination confirmed the ossifying fibroma. Discussion/Conclusion: Slow and progressive, cemento-ossifying fibroma is a rare benign tumor that reaches the maxilla and more frequently the mandible. The ossifying and cementifying fibromas are differentiated by their clinical, radiological, and histological findings. The authors discuss the pathogenesis and radiological signs guiding the choice of diagnostic and thera- peutic methods. The treatment is surgical with an enucleation or wider resection with bone reconstruction for large fibromas. © 2010 Published by Elsevier Masson SAS. Introduction Cemento-ossifying fibroma is classified as an osteogenic tumor, defined as a well-differentiated tumor, occasionally encapsulated, comprising fibrous tissue containing variable quantities of calcified material resembling bone and/or cement. Progression is slow and progressive. ∗ Corresponding author. Tel.: +33 2 47 47 46 40; fax: +33 2 47 47 85 29. E-mail address: laure@med.univ-tours.fr (B. Laure). We report a case of cemento-ossifying fibroma dis- covered incidentally during imaging studies and its management. Clinical case A 72-year-old patient was referred for the incidental dis- covery on an orthopantomogram of a left-sided mandibular angle lacuna (Fig. 1). The patient was asymptomatic and presented no hypoes- thesia in the V3 territory. 1879-7296/$ – see front matter © 2010 Published by Elsevier Masson SAS. doi:10.1016/j.anorl.2010.06.005