Found an interesting link on S100-B and TIA vs TBI. Full article is on right side-bar of the abstract link, for your reading pleasure.

I would caution that we need to remember that a TIA is stroke related, and if your PCP is suggesting you may have had one, you have clearance of that event, separate from your TBI episodes and problems. TIA's can be repetitious and eventuate into a full on Stroke event, and should not be disregarded. Or, they can be a one time event. They are not predictable.

Its as if our TBI problems are just not enough sometimes, I know.

Best Wishes.....