I have a 7 year old son with suspected NF-1. He has optic nerve gliomas and tumors around the optic chaism. He was on chemo for 1.5 years-tumor got a lot smaller.Now, after 1.5years off chemo,tumor appears alittle larger,cysts around the tumor growing pretty fast. The chemo Dr. said a different chemo would likely work again. Another Dr. said radiation would likely be our best bet. I know he is going to need radiation,but since they will radiate most of his brain,I thought it might be best if we could get a couple of more years out of the chemo first. His eye sight has worsened slightly in the past couple of years even when the tumor shrank. He has 70% in one eye, 5% in the other,no other symtoms. He handled the first round of chemo very well. Could you give me some pros and cons on the radiation treatment.