My son has dilated Virchow-Robin spaces (perivascular spaces). This was found on MRI at age 6. He is on autism spectrum and it appears this is not an uncommon finding in autism and other developmental disorders. All I know is that little is known still about the origin and significance or them being enlarged or prominent. My understanding is that it is usually "age" related so that didn't help me to understand why it happened in children and young adolescents. I looked into it very thoroughly years ago (in the context of autism) but doctors didn't seem at all concerned, in fact they were quite nonchalant about it. There was a new member last week or so in New Members Forum asking about enlarged perivascular spaces as well.

ps. there seems to be a scale of sorts. normal, accentuated and dilated. I've also seen the word prominent used in some studies. Also, "headache" comes up a lot in studies you read. My son had migraines at the time as well although he did grow out of those.