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A retrospective study of spontaneous remission and long-term outcome in patients with infantile spasms
R A Hrachovy1, D G Glaze, J D Frost
1Department of Neurology, Baylor College of Medicine, Houston, Texas 77030.
Insights
Infantile spasms show a low spontaneous remission rate, with only 25% of patients achieving remission within 12 months without hormonal treatment. Long-term outcomes reveal significant developmental impairment in most cases.
Area of Science:
- Pediatric Neurology
- Developmental Neuroscience
Background:
- Infantile spasms (IS) are a severe epilepsy syndrome in infants.
- Understanding natural history is crucial for evaluating treatments.
Purpose of the Study:
- To determine the spontaneous remission rate of infantile spasms.
- To assess the long-term developmental outcomes in untreated patients.
Main Methods:
- Retrospective analysis of 44 patients with infantile spasms.
- Data collected on remission rates and developmental status at follow-up.
Main Results:
- Cumulative spontaneous remission rate at 12 months was 25%.
- At an average follow-up of 80 months, only 9% had normal development or mild impairment.
- The majority of patients exhibited significant developmental retardation.
Conclusions:
- Hormonal treatment is likely essential for improving outcomes in infantile spasms.
- These findings provide a benchmark for assessing the efficacy of new therapeutic drug trials for IS.
Abstract:
The spontaneous remission rate and long-term outcome in 44 patients with infantile spasms not treated with hormonal drugs were studied. The cumulative spontaneous remission rate during the first 12 months after onset of infantile spasms, as determined by retrospective analysis, was as follows: 1 month, 2%; 2 months, 2%; 3 months, 5%; 4 months, 7%; 5 months, 9%; 6 months, 11%; 7 months, 11%; 8 months, 14%; 9 months, 16%; 10 months, 18%; 11 months, 25%; 12 months, 25%. The average age at follow-up was 80 months. Nine percent of patients had normal development or only mild impairment. The remainder showed various degrees of retardation. These data should be useful in the design and interpretation of therapeutic drug trials in patients with infantile spasms.