Abstract
Abstract Primary intraosseous meningiomas are uncommon. The osteolytic variants of these tumors are even rarer. When one reviews a bony skull lesion, the differential diagnosis is very wide and includes both malignant and benign diseases. In case of primary skull meningioma, correct diagnosis and total resection of the lesion ensures curative therapy. Presented is a case of osteolytic skull lesion not invading the dura that was proved to be a fibrillary meningioma with regions of syncitial pattern.
Highlights
Primary meningiomas of the skull without involvement of the dura and intracranial cavity comprise an uncommon entity. These lesions often appear as hard osteoblastic tumors which appear as hyperdense areas of the calvarial bones in x-ray studies [1]
Case presentation A 62-year-old right-handed male Iranian farmer presented with a soft enlarging mass in the left fronto-parietal region
Primary intraosseous meningiomas are usually of osteoblastic subtype. These lesions may present as an osteolytic skull lesion [1]
Summary
Introduction Primary meningiomas of the skull without involvement of the dura and intracranial cavity comprise an uncommon entity. These lesions often appear as hard osteoblastic tumors which appear as hyperdense areas of the calvarial bones in x-ray studies [1]. They are different from the so-called en plaque or “carpet” meningiomas in that the latter involve the dura and intracranial cavity. Of a rarer prevalence are lytic skull meningiomas that are not readily suspected because of their radiological appearance; rather they are investigated first for a primary source of malignancy elsewhere in the body or are thought to be other lytic lesions of the skull.
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