Hi Samuel,
I’m not used to looking at a young person’s MRI so not sure what is normal for your age group and what is not but I would be asking “What is causing the cerebellar ectopia to start ?”. “Do you have a degree of raised intracranial pressure going on ?”. You do seem to have a lot of Cerebrospinal fluid (CSF) in and around your brain and within the folds of your brain (interstitial).
Why did you have this MRI ? What were your symptoms ? How long have you had your symptoms ? Have you had an MRI before (that you can compare this one with) ? Are there any people in your family that suffer with similar symptoms ?
Regards
Barbara
(UK)