Infarction involving the subcortical territory: Basal ganglia infarct
A small hypodense lesion is noted at the right lentiform nucleus in this non-contrast CT (Figure 1). This is a lacunar infarct and is usually due to small vessel occlusion as a result of chronic hypertension. Lacunar infarcts are defined as lesions that are ≤1.5cm in size on brain imaging.
Patients usually present with one of the 5 lacunar syndromes:
- Pure motor stroke
- Pure sensory stroke
- Mixed sensorimotor stroke
- Ataxic hemiparesis and
- Dysarthria-clumsy hand syndrome
This patient presented with acute onset of left sided weakness several years ago. There were no sensory signs nor any cortical or brainstem signs.