Osteochondroma of the mandibular ramus: Report of a rare case

Osteochondroma or osteocartilaginous exostosis is characterized by a cartilage-capped osseous projection protruding from the surface of the affected bone. Incidence in the general population is reported as 1%. It occurs in adolescence or young childhood, with 80% of cases being in first 2 decades of life. Here we report a case of osteochondroma in a 64-year-old female who presented with large tender bony hard growth on the inferioposterior aspect of right ear. The imaging studies using computed tomography and magnetic resonance imaging showed a large calcified mass of size with irregularly lobulated contour arising from the posteriosuperior aspect of ramus involving the condyle with an apparent continuation with cortex and medullary space giving the diagnosis of osteochondroma. The histopathologically lesion was composed of immature bony tissue with a cartilagenous cap, confirming the diagnosis of osteochondroma. Tumor was resected under general anesthesia. No recurrence was found till date i.e. 18 months.