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Sickle cell disease: ischemia and seizures
Mara Prengler1, Steven G Pavlakis, Stewart Boyd
1Neurosciences Unit, Institute of Child Health, University College London, London, United Kingdom. m.prengler@ich.ucl.ac.uk
Annals of Neurology
|July 29, 2005
Summary
Seizures in children with sickle cell disease (SCD) are linked to vasculopathy and reduced blood flow in the brain. These factors, identified through advanced imaging, may contribute to seizure development in this vulnerable population.
Area of Science:
- Neurology
- Pediatrics
- Vascular Medicine
Background:
- Sickle cell disease (SCD) presents a significantly higher risk of seizures in children compared to the general population.
- Prospective data on the underlying mechanisms of SCD-associated seizures are limited.
- Understanding these mechanisms is crucial for developing targeted preventative and therapeutic strategies.
Observation:
- A study involving 76 children with SCD utilized transcranial Doppler, MRI, and perfusion MRI to investigate neurological complications.
- Neurological assessments included evaluations for seizures, stroke, transient ischemic attack, learning difficulties, headaches, and abnormal transcranial Doppler findings.
- Six patients with recent seizures also underwent electroencephalography (EEG) to correlate findings.
Findings:
- Abnormal transcranial Doppler results were more prevalent in children with seizures and other neurological complications than in asymptomatic children.
- No significant differences in abnormal structural MRI or magnetic resonance angiography were observed between groups.
- Relative decreased cerebral perfusion was detected in all seizure patients and in a subset of non-seizure patients, often ipsilateral to EEG abnormalities.
Implications:
- Vasculopathy and focal hypoperfusion are suggested as key contributing factors to seizures in children with sickle cell disease.
- These findings highlight the importance of neurovascular assessment in managing children with SCD.
- Further research can explore the direct link between hypoperfusion and epileptogenesis in SCD.