BILATERAL THALAMIC INFARCTIONS - A RARE PRESENTATION OF POSTERIOR CIRCULATION STROKE
Abstract
Bilateral thalamic infarctions are rare
presentations of stroke, as a result of a
complex combination of risk factors and
a predisposing vessel distribution. Thalami
and midbrain arterial supply arises
from many perforating blood vessels with
a complex distribution with many variations.
One rare variation, named the artery
of Percheron, is a solitary arterial
trunk that arises from one of the proximal
segments of a posterior cerebral artery
and supplies the paramedian thalami and
the rostral midbrain bilaterally. Occlusion
of this artery results in bilateral thalamic
and mesencephalic infarctions. We describe
one patient with a presumed occlusion
of the artery of Percheron.
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