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Risk factors of infantile spasms compared with other seizures in children under 2 years of age
H Rantala1, W D Shields, P D Christenson
1Department of Neurology, University of california at Los Angeles School of Medicine, California, U.S.A.
Insights
A family history of seizures modestly increases the risk for infantile spasms, particularly in cryptogenic cases. However, underlying neurological issues like neonatal seizures and hypoxia are stronger risk factors.
Area of Science:
- Neurology
- Pediatrics
- Genetics
Background:
- Infantile spasms are a severe epilepsy syndrome in infants.
- Identifying risk factors is crucial for early diagnosis and intervention.
Purpose of the Study:
- To analyze the magnitude of risk factors for infantile spasms.
- To compare risk factors between infantile spasms and other neurological conditions in children.
Main Methods:
- Retrospective analysis of medical records from 80 children with infantile spasms.
- Comparison with control groups: 474 children with other epilepsies, 2,196 with febrile seizures, and 262 with CNS infections.
- Evaluation of family history of seizures and associated neurological abnormalities.
Main Results:
- A family history of seizures was associated with increased risk for infantile spasms (OR 2.82), other epilepsies, and febrile seizures.
- Family history risk for infantile spasms was significant only in the cryptogenic group.
- Children with infantile spasms showed higher rates of cerebral palsy, microcephaly, hydrocephaly, CNS malformations, neonatal hypoxia, and neonatal seizures.
- Underlying neurological abnormalities, particularly neonatal seizures, hypoxia, and CNS malformations, were strongly associated with infantile spasms.
Conclusions:
- While a genetic predisposition exists, underlying neurological abnormalities are more significant risk factors for infantile spasms.
- Neonatal seizures, hypoxia, and CNS malformations are key risk factors requiring attention in infantile spasms.
- Further research into the interplay of genetic and environmental factors in infantile spasms is warranted.
Abstract:
To analyze the magnitude of the risk factors for infantile spasms, we evaluated the records of 80 children with infantile spasms, 474 children with other types of epilepsy, 2,196 children with febrile seizures, and 262 children with CNS infections. There was a family history of seizures in 13.8% of children with infaNtile spasms, 28.5% of children with other forms of epilepsy, 25.5% of children with febrile seizures, and 5.3% of children with CNS infections. Children with a family history of seizures were 2.82 times more likely to have infantile spasms, 7.05 time more likely to have other epilepsy, and 6.08 time more likely to have febrile seizures than controls (children with CNS infections). However, a family history of seizures increased the risk for infantile spasms only in the cryptogenic group. Children with infantile spasms were significantly more likely to have cerebral palsy, microcephaly, hydrocephaly, CNS malformations, neonatal hypoxia, or neonatal seizures than children with other types of epilepsy, febrile seizures, or CNS infections. There was a modest genetic predisposition to seizures in children with infantile spasms. However, our data suggest a much stronger association with underlying neurologic abnormalities, mainly neonatal seizures, neonatal hypoxia, and CNS malformations.