Central nervous system disorders

VII./4.4.: Presentation, prognosis

Most of the meningiomas present with good prognosis. Average five-year survival reach 90%, ten-year survival is 74-79%, and 15-year survival is around 70%. Meningiomas typically grow slowly, volume of grade I tumor double in 5.2 years on the average. Growth rate is faster in younger, and much slower in elder patients. Calcificated meningiomas grow very slowly. 60% of incidentally found, asymptomatic meningiomas show no tendency of growing. Atypical and malignant meningiomas present worse prognosis with a five-year survival around 50%.

About 80% of meningiomas could be surgically treated. Recidive rate of grade I meningiomas is 3% with total resection in a five-years follow-up, this rate is 37% in atypical meningiomas and 78% in anaplastic forms. If meningioma was the cause of symptomatic epilepsy, about two-third of the patients will be seizure free after surgical resection.