Adult Medulloblastoma diagnosis

Hey everyone, 

I'm a 31 year old female just diagnosed with a Medulloblastoma. 

I'm absolutely terrified as it is in my brainstem so can't be operated on, i am going to have to rely on radiotherapy instead by the sounds of it. I'm seeing an oncologist this afternoon to have a discussion. 

Does anyone else have any experience with this type of brain tumour in an adult? I can only find information for children.

I'm desperately trying to find some positive stories and positive things to think about as i was only diagnosed yesterday and everything is so surreal and distressing right now.

If anyone could give me some hope i would really appreciate it.