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Neuropathological aspects of infantile spasms
1Ludwig Boltzmann Institute of Clinical Neurobiology, Lainz-Hospital, Vienna, Austria.
Brain & Development
|January 1, 1987
Summary
Infantile spasms are linked to diverse brain lesions from early development through infancy. Approximately 61% of cases involve fetal-originating brain abnormalities, highlighting developmental impacts on early-onset epilepsy.
Area of Science:
- Neuropathology
- Developmental Neuroscience
- Pediatric Neurology
Background:
- Infantile spasms (IS) are a severe early-onset epilepsy.
- Understanding the neuropathological basis of IS is crucial for diagnosis and treatment.
- Previous studies have explored various etiologies but a comprehensive classification of brain lesions is needed.
Purpose of the Study:
- To review neuropathological findings in infantile spasms.
- To classify cerebral lesions associated with IS based on timing and type.
- To determine the proportion of IS cases attributable to different etiological categories.
Main Methods:
- Review of 50 personal autopsy cases of infantile spasms.
- Systematic literature review of 214 confirmed cases.
- Classification of neuropathological findings into four main groups based on lesion timing and type.
Main Results:
- Infantile spasms are associated with a broad spectrum of cerebral lesions from various causes and developmental stages.
- Lesions were categorized into: embryofetal (malformations, metabolic disorders), perinatal/postnatal encephalopathies, combined lesions, and acute injuries.
- Embryofetal lesions, alone or combined with later insults, accounted for approximately 61% of autopsy-confirmed cases, suggesting a significant role of early developmental insults.
Conclusions:
- Infantile spasms are frequently linked to early developmental brain abnormalities, often termed 'fetal epilepsies'.
- Perinatal and postnatal insults affecting the immature brain also contribute to IS.
- The neuropathological findings provide a framework for understanding the diverse etiologies of infantile spasms and their potential progression to other epileptic syndromes.