[Ag-NOR in meningiomas. Clinical and morphologic study of 14 cases].

A total of 14 meningiomas were studied in this report, grouped in different subtypes. The number of NORAg of each was analyzed and quantified. This study analyzes the results obtained as opposed to different subtypes and with clinic and biologic characteristics of patients. Similarly, technical characteristics of silver impregnation method to determine nucleolar organizer regions (NORAg) and its application as a routine method were analyzed. We propose this as a fast and reliable method to analyze of neoplastic proliferative activity.