Diagnoses accuracy varies...and can be very controversial.

Some studies (more recently say up to 40% on autopsy are inaccurate)..and others say 10-25% at least.

I would assume that a neuro diagnosis would be difficult to prove while alive. So don't fret over this idea..interpretation.

But do be concerned IF it is a result of a TIA or stroke, you need to have c-reactive protein, and homocysteine to monitor so it does not likely repeat itself. Keep blood pressure under control, also. Lipoprotein a is also a marker for stroke. You can have that test too. (it is genetic and if low, your risk is less, much less).

One thing that is problematic is aspirin. There is new evidence that even with tiny doses, there can be small bleeds in the brain.
So your new test, may show that.

Testing only goes so far. It is not cast in stone.