www.jkns.or.kr Rapid Progression of Early Delayed Radiation Effect

Early delayed radiation effects are known to occur within several months after completing radiotherapy for brain tumors. We present marked changes of magnetic resonance imaging (MRI) scan that occurred one month after radiotherapy in a patient with a pleomorphic xantho-astrocytoma, which was eventually diagnosed as an early delayed radiation effect. Such an early development of dramatic MRI change has not been reported in patients treated with radiotherapy for pleomorphic xanthoastrocytomas. 10.3340/jkns.2009.46.6.564 KEY WORDS: Blood brain barrier ˙ Delayed radiation effect ˙ Low grade glioma ˙ Magnetic resonance imaging ˙ Pleomorphi