Malignant Glioma of the Optic Chiasm Eight Years After Radiotherapy for Prolactinoma

• A 41-year-old man had rapidly progressive visual loss caused by a malignant glioma that developed in the optic chiasm eight years after radiation therapy for a recurrent prolactinoma. Radiation-induced glioma should be considered as a cause of progressive visual loss in patients who have received irradiation in the region of the sella turcica.