Fibrous dysplasia (FD) is a slowly growing benign skeletal fibro-osseous condition, resulting from a localized change in normal bone metabolism that results in the replacement of all the components of cancellous bone by fibrous tissue. A 50-yr-old male patient with FD attended our clinic with a complaint of swelling in the right maxilla. In extra-oral examination, a significant asymmetry was observed. Intraoral examination revealed a painless swelling at the right maxillary posterior region. Increase in bone formation within the lesion was observed with a radiographic appearance that is referred to as "ground glass". The aim of this case report was to present clinical, histopathological and radiographic findings of a patient with FD.