Brainstem Glioma

Dear Readers,

My baby is six years old and he has gone through brain tumor surgery pilocytic astrocytoma.

doctors couldn't take out the complete tumor due to critical area brainstem. After surgery he is fine, we were suggested to go for ciberknife radio therapy, when we visited the doctor he said my baby can not survive for more that 3 months to 3 years even after radiation. I am totally depressed, I dont know why doctor who performed the surgery said he has 95% of curing chances but radiology doctor said he can not survive. Please some one help me on this. I am totally lost.