Meningiomas constitute about 15 to 18% of all intracranial tumors and are usally located in the subdural compartment. Intradural meningiomas may secondarily involve the overlying calvarial bone and provoke osteoblastic or, less commonly, an osteolytic...
Meningiomas constitute about 15 to 18% of all intracranial tumors and are usally located in the subdural compartment. Intradural meningiomas may secondarily involve the overlying calvarial bone and provoke osteoblastic or, less commonly, an osteolytic reaction. Meningiomas developing outside the dura mater, without an intradural counterpart, are rare and have been reported in only 1 to 2% of all intracranial meningiomas. We present a rare case of coexisted subdural and extradural meningioma.