I have been having headaches and my history is BC 5 yrs ago, so my nuerologist did a brain mri, and I got my report and I don't understand, "a few foci of subcortical white matter signal alteration are seen and may indicate areas of previous small vessel ischemic injury or demyeliniation." Every thing is else normal, with some patchy opacification of the mastoid air cells on the left inferiorly.
I don't understand what that means? Any help would be greatful. thanks kstknkc