A 26-year-old male patient reported to the Department of Oral Medicine and Radiology with the chief complaint of discomfort and presence of a hard, painless mass in upper right back region

Osteochondroma is the most common benign neoplasm of the skeleton commonly affecting the long bones due to endochondral growth. In the craniofacial region this tumour is very rare. The sites of predilection are the coronoid process and the mandibular condyle. Here, we report an exceptional case of osteochondroma originating from the maxillary posterior region in a 26-year-old male patient, mimicking an odontome, not reported earlier in the literature. We also discuss the importance of various imaging modalities, most importantly, computed tomography (CT) in the evaluation of such lesions. However, histopathology remains the mainstay for definitive diagnosis in such conditions. [Table/Fig-1]: Intraoral photograph showing the mass in maxillary right posterior region distal to the maxillary first molar along with erythematous area on the buccal mucosa [Table/Fig-2]: Preoperative Panoramic view showing the radiopaque lesion extending from first molar distally to maxillary tuberosity [Table/Fig-3]: Preoperative CT Images (a) Sagittal section showing mass of radio density similar to that of bone Hyper dense mass has displaced the second molar and was lifting the wall of maxillary sinus (b) Coronal section showing large radio dense mass displacing the second molar whichhad lifted the floor of maxillary sinus (c) Axial section showing large radio dense lesion with a density less than that of tooth structure (d) Three dimensional view of CT showing large radiopaque mass in maxillary right posterior region www.jcdr.net Mayuri Jain et al., Osteochondroma of Maxilla Posterior Region: A Unique Case Journal of Clinical and Diagnostic Research. 2015 Apr, Vol-9(4): ZD14-ZD15 15