Multiple meningiomas: a long-term review

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Abstract
Ten cases of multiple meningiomas seen over a 34-year period have been reviewed. The total case load from which these cases were selected was 566. The incidence of multiple meningiomas found prior to the introduction of computerized tomography (CT) in this series was 1.1%. The incidence since the introduction of CT was 8%. In eight cases all the tumors were found at the initial presentation and surgery; in the other two cases new tumors were discovered 1 and 4 years later. In only one case was von Recklinghausen's disease known to be present, and this patient developed new tumors. Six cases have been followed for 5 or more years, two for 16 years. Tumor recurrence has not been seen. All the patients were females. There was a higher proportion than usual of the whorling psammomatous type of tumor; papillary, angioblastic or malignant forms were not noted. The possibility of multiple meningiomas being a forme fruste of von Recklinghausen's disease is considered.

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