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Updated: Jul 15, 2026

Transient Middle Cerebral Artery Occlusion Model of Neonatal Stroke in P10 Rats
Published on: April 21, 2017
Siblings with infantile cerebral stroke and delayed multivessel involvement--a new hereditary vasculopathy?
Andrea Klein1, Margrit Fasnacht, Thierry A G M Huisman
1Department of Neurology, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032 Zürich, Switzerland. andrea.klein@kispi.unizh.ch
Insights
Two sisters presented with unusual stroke-like episodes and later developed systemic hypertension and narrowed arteries. This suggests a rare, inherited systemic vasculopathy affecting multiple organs.
Area of Science:
- Neurology
- Genetics
- Vascular Biology
Background:
- Investigating rare genetic disorders causing neurological deficits in children.
- Understanding the etiology of non-atherosclerotic vasculopathies.
Observation:
- Two sisters presented with recurrent stroke-like episodes in infancy, initially mimicking metabolic disorders.
- Later development of pulmonary and systemic hypertension, myocardial hypertrophy, and renal artery stenosis.
- Cranial imaging revealed moyamoya appearance with narrowed carotid and basilar arteries and collateral formation.
Findings:
- Exclusion of metabolic stroke and MELAS (mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes).
- Systemic vasculopathy characterized by stenosis and rarefaction of pulmonary and coronary arteries.
- Normal aorta and retinal vessels despite widespread arterial abnormalities.
Implications:
- Suggests a novel hereditary systemic vasculopathy of unknown genetic origin.
- Highlights the importance of long-term monitoring for systemic complications in patients with unexplained childhood strokes.
- Underscores the need for further research into the genetic basis of rare vasculopathies.
Abstract:
We describe an unusual vasculopathy in two sisters of non-consanguineous parents. The first child developed an acute hemiparesis and focal seizures at the age of 6 months during a febrile illness. Magnetic resonance imaging (MRI) of the brain showed bilateral cortical-subcortical infarction not confined to a vascular territory. Subsequently, the child had a persistent stable neurological deficit. Her younger sister had a similar encephalitis-like episode at the age of 4 months, with left-sided cortical-subcortical ischaemic lesions. Two months later she had left-sided focal seizures. MRI showed a right-sided cortical enhancement, magnetic resonance angiography (MRA) was normal. The neurological deficit was stable and she was seizure free. These episodes were initially interpreted as metabolic strokes, but work-up was normal and mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) was excluded. In their teens both sisters were diagnosed with pulmonary and systemic hypertension and, due to the arterial hypertension, myocardial hypertrophy. Renal artery stenosis, pathological pulmonary arteries, and stenosis and rarefication of coronary arteries were found; the aorta and retinal vessels were normal. Repeat cranial MRI and MRA showed multiple collaterals, while the carotid and basilar arteries were extremely narrowed (moyamoya appearance). We suggest the diagnosis is a hereditary systemic vasculopathy of unknown origin.
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