Pure motor stroke is the commonest lacunar syndrome, but it may be associat
ed with nonlacunar mechanisms of infarction. Pure motor brachiofacial weakn
ess has been considered as a partial syndrome depending on a lacunar mechan
ism. We studied the correlations between stroke type, topography of infarct
ion and etiology in 22 patients with pure motor brachiofacial weakness who
were consecutively admitted to our stroke unit during a 10-year period. Sev
enteen patients had a small deep infarct, 4 had a cortical infarct in the s
uperficial MCA territory and 1 had no specific lesion. The part of the card
iovascular risk factors was about 36% for smoking, 13% for diabetes mellitu
s, 60% for dyslipidemia and 40% for heart disease. Hypertension was present
in 75% of our cases. None of the patients had a large artery stenosis on D
oppler ultrasonography. We concluded that brachiofacial pure motor stroke i
s not always correlated to lacunar infarcts and may be due to a cortical in
farct. MRI should be performed when brain CT is normal because of the impli
cations it may have in management and therapy. Copyright (C) 2001 S. Karger
AG, Basel.