Multiple meningiomas. Clinical and computer tomographic observations.

The same histological types of tumor are found in multiple as in solitary meningiomas. Multiple meningiomas cannot be considered in every case to be a forme fruste of von Recklinghausen's disease. The incidence of multiple meningiomas in this paper is higher than had been reported before the introduction of computer tomography (CT) into clinical practice. The number of tumor nodes is determined more accurately by CT than by angiography because tumors are detected in patients without neurological deficit. CT has limitations in the verification of small meningioma nodules near the base of the skull and in the differentiation of multiple meningiomas from meningeal meningiomatosis or primary meningeal sarcomatosis.