Glioblastoma induction after radiosurgery for meningioma

A 70-year-old woman developed a glioblastoma in the irradiated field 7 year s after stereotactic radiosurgery for meningioma. Glioma induction has been previously reported after external beam radiation for leukaemia, pituitary adenoma, tinea capitus, and meningioma. This radiosurgery-induced malignan cy may portend further reports of tumour induction. The theoretical risk of tumour induction by low doses of radiation to normal neural tissue after r adiosurgery is now confirmed, Reports of additional cases of radiosurgery-i nduced tumours might temper the use of this increasingly used technique for benign surgically accessible lesions.