We have been told our son has a birthmark on his brain and that this needs to be investigated under an MRI scan. He is a perfectly normal 6 year old. . . .other than the fact that a few weeks ago (and 2 yearsc previously) he banged his head & had a convulsion / passed out. I guess this 'birthmark may be related to this?! We are going to see a paediatric neurologist on 1st June who is going to explain more but justy wondered if anyone else out there had been told this / knows what is means.Thank you