An osteoma, a slow-growing benign osseous neoplasm of the bone, is characterized by a proliferation of osteoblasts that form bone trabeculae in the connective tissue stroma. It is an uncommon condition that generally occurs in the maxillofacial bones. This neoplasm may be clinically silent for years without any symptoms. It is usually diagnosed when it becomes enlarged and is incidentally observed during a radiological examination. The radiographic characteristic of the lesion is a well circumscribed round or oval radiopaque mass. In this paper, we present a case of an unusual localization of a peripheral osteoma incidentally detected during radiographic examination with subsequent three-dimensional computed tomography evaluation.