Multiple Intracranial Meningiomas

Meningiomas are common intracranial tumors arising from the arachnoid cells of the meninges, but the neurosurgical frequency of multiple intracranial meningiomas is low ; the pathogenesis of multiple meningioma is still unknown. The authors report sixth cases of multiple intracranial meningiomas, representing 3.3% of all meningiomas surgically removed at our hospital during the past ten years. Four cases were female. In four cases the meningiomas affected one hemisphere, and 62% were located in the convexity. All tumors were removed in one stage and except in case 5, there has been no recurrence. In this report, we present precise descriptions of cases 3 and 5.

Collision Tumors in Meningioma:Subtemporal Meningotheliomatous Meningioma and Subtemporal and Infratentorial Psammomatous Meningioma: Case Report

The overall incidence of multiple meningiomas has been estimated to be about 8 percent since the introduction of the computerized tomography. The authors report a rare case of multiple meningioma that was composed of two histologically separate types occurring in intimate juxtaposition with each other and not intermixed. One of the multiple miningioma located in subtemporal region was meningotheliomatous type, whereas the other located in both the subtemporal and infratentorial region was psammomatous type. The clinical, radiological, and histopathological features of these lesions are discussed together with a review of the literature.

Multiple Meningiomas: Case Report

Multiple meningiomas are a seldom encountered neoplasm. Most authors report an incidence ranging from 1 to 3% of all meningioma prior to the introduction of computerized tomography(CT). The routine use of CT has resolved diagnostic problems involved with multiple meningiomas and the incidence was 8% since the introduction of CT scan. In fact, it may be difficult to differentiate "true multiple meningioma" from simple recurrences or the special variant(forme fruste) of Von Recklinghausen's disease, and the pathogenetic factors related to true multiple meningioma is unknown, but various theroies of the etiology are explored by literature reports. We report the rare case of multiple meningiomas which diagnosed by CT scan and confirmed by operation.