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¹Şişli Etfal Hospital, Department of Neurosurgery, İstanbul
²Şişli Etfal Hospital, Department of Pathology, İstanbul Intracranial mesenchymal chondrosarcomas, and especially those that originate from the dura mater, are very rare. This paper describes two cases of primary intracranial mesenchymal chondrosarcoma that originated from the right frontal dura mater and the left tentorium. The patients were both females, aged 25 and 30 years of age. The patient with the tentorial tumor had undergone surgery for the same lesion 1 year earlier, at which time the mass had been histopathologically misdiagnosed as meningioma. We discuss the histopathological features, computed tomography findings, and treatment of these tumors, and review the relevant literature. Keywords : Itracranial mesenchymal chondrosarcoma, meningeal tumor, tentorial tumor