Primary osteogenic sarcoma of the calvaria.

Osteogenic sarcoma of the skull is rare [1-7], particularly as a primary development in the later decades of life without associated Paget disease or history of irradiation. Because of the paucity of cases, the radiologic findings of calvarial osteogenic sarcoma have not been described in detail. Previous reports have dealt mainly with plain skull radiographs for the diagnosis of this tumor before biopsy. We present two cases of primary osteogenic sarcoma of the calvaria in 11and 71year-old patients who did not have predisposing conditions. They illustrate characteristic neuroradiologic findings which we believe could provide accurate preoperative diagnosis and guide surgical management of these tumors.