SIGNIFICANT TUMOR VOLUME REDUCTION OF MENINGIOMAS AFTER STEREOTACTIC RADIOTHERAPY

Abstract

Meningiomas shrink significantly after SRT. TV shrinkage declines towards a steady state, which is not yet defined. Younger age and smaller TV are determining factors. Previous operations, sex, prescribed dose, or histological subtypes do not affect TV shrinkage. Eighteen to 24 months after irradiation, when symptoms are clinically stable, is the best time for the first magnetic resonance imaging scans evaluating tumor control and shrinkage.