Abstract
A case of diffuse sclerosing osteomyelitis (DSO) in the maxilla of a 25-year-old male is presented. His chief complaint was recurrent painless swelling in the maxillary right molar region over a 3-year-period. The periapical and panoramic radiographs of the right maxilla showed diffuse sclerotic areas. Computed tomography (CT) indicated a high density area in the right maxilla. Although the tentative diagnosis was fibrous dysplasia on the basis of history, clinical symptoms and radiologic examination, the biopsy results supported chronic diffuse sclerosing osteomyelitis. The maxillary location and the painless course of the lesion in a male patient is a rare occurrence.