Solitary intradural intracranial osteoma.

A 20-year-old woman presented with a 4-month history of persistent right frontotemporal headache. There were no features of raised intracranial pressure. Plain radiographs of the skull showed a dense calcified mass in the right frontal area. Computed tomography revealed the lesion to be uniformly hyperdense and non-enhancing. Magnetic resonance imaging confirmed the dural origin of the lesion which was hyperintense and non-enhancing. At operation a bony hard intradural mass was confirmed and excised. Histology revealed it to be an osteoma.