A cerebellar glioblastoma was discovered in a 28 year old woman, 5 years after a 
focal 50 grays brain irradiation for meningioma of the clivus. This case 
fulfilled the accepted criteria for radiation-induced neoplasms of the central 
nervous system, namely a second histologically-proven tumor different from the 
first lesion, a location within the irradiated area and a long latent period.