NeuroradiologyInfarction, basal ganglia
usually unilateral following middle
cerebral artery occlusion, with specific involvement of the region vascularized by the perforating branches of the horizontal portion of the
artery. Often haemorrhagic, it may be associated with more extensive sylvian
infarction or may be isolated if efficient cortical collateral circulation exists. The internal
capsule is usually involved, producing a dense contralateral hemiplegia and hemisensory deficit. The
CT picture is that of hypodensity involving the head of caudate, putamen and globus pallidus. MR (
Fig.1) shows marked
T2 hyperintensity in the same area. Marked homogeneous enhancement following contrast injection can be observed (see
infarction cerebral).
GS
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a. T2-weighted MR image. Hyperintensity of the right basal ganglia, of the frontotemporal and insular cortex, following thrombosis of the right middle cerebral artery.
b. Axial MR image demonstrates thrombosed middle cerebral artery (asterisks)
c. Right common carotid angiogram shows complete occlusion of the middle cerebral artery.
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Infarction, basal ganglia, Fig.1 (a) | | Infarction, basal ganglia, Fig.1 (b) | | Infarction, basal ganglia, Fig.1 (c) |