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Osteomas are benign neoplasms consisting of mature normal osseous tissue. They are common on the long bones of the extremities and found in the sinuses, facial bones, skull and madible in the head and neck region. Much rarer, however, are osteomas arising from subdural space with displacement of the underlying brain. A 42-year-old woman presented with a history of intermittent left frontal headache that was proved to be due to an intracranial lesion. After surgical removal, it was found to be an subdural osteoma. We report this case with pertinent literatual reviews. Key words:Osteoma;Subdural.