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Ischaemic Changes of Different Anatomical Regions or Vascular Territories

Infarction involving the subcortical territory: Basal ganglia infarct

A small hypodense lesion is noted at the right lentiform nucleus in this non-contrast CT arrow_1 (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:

  1. Pure motor stroke
  2. Pure sensory stroke
  3. Mixed sensorimotor stroke
  4. Ataxic hemiparesis and
  5. 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.

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