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Signficance of lunar infarct on CT

I recently had what I believe is a migraine.  With it, I lost about 1/4 of my visual field (left lower) and had some headache.  I am on my 4th day of this incident.  Also for the last year, my HTN, which I've had for over 30 years now, has gone nuts, varying from 200/117 down to 150/88, but mostly staying around 170/102.  I had a head CT with and without contrast was said to be a negative study.  It starts by saying "No infarcts seen" and then later in the report, saying "Subcentimeter lacunar infarct in the left caudate nucleus."  I thought my doc would think it was strange that it said "No infarct" and then described an infarct.  So, for any radiologists or neurologists out there...my question is:  Why do both of those statements in the same report make sense?  Are subcentimeter infarcts insignficant enough to not do damage?  Why, since I'm continuing to have the vision loss after 4 days and I continue to have the headache (which is worsening, when it occurs, as time goes by) would they not consider the infarct pertinent to my symptoms?  This is totally interetesting to me now and I want to understand.    Thank you ahead of time for your input!
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