Intraosseous calvarial meningioma of the skull presenting as a solitary osteolytic skull lesion: case report and review of the literature.

Intraosseous calvarial meningiomas, defined as meningiomas confined to the skull with no epidural or subcutaneous component, are rare and usually exhibit osteoblastic activity. We present a case of a primary intraosseous meningioma in the right frontal bone that presented radiologically as a solitary lytic skull lesion and was completely excised. The lesion was benign without recurrence for 1 1/2 years. According to our review of the literature, our case is the first with documentation on computed tomography. In cases of solitary osteolytic skull lesions, meningioma should be considered even though it may not seem likely, because management will be directed to radical excision with good prognosis rather than biopsy.