Surgery for symptomatic infant-onset epileptic encephalopathy with and without infantile spasms

Area of Science:

• Pediatric Neurology
• Epileptology
• Developmental Neuroscience

Background:

• Infant-onset epilepsy (IOE) poses significant challenges to neurodevelopment.
• Medically refractory infantile spasms (IS) are a severe form of IOE.
• The impact of epilepsy surgery on adaptive behavior in IOE requires further elucidation.

Purpose of the Study:

• To compare pre- and postsurgery developmental quotients (DQ) using the Vineland Adaptive Behavior Scale (VABS) in children with IOE.
• To analyze outcomes based on the presence and treatment of infantile spasms (IS).
• To assess the association between surgical timing and developmental outcomes in IOE patients.

Main Methods:

• Children with IOE undergoing surgery were categorized into three groups: medically refractory IS, successfully treated IS, and no IS history.
• Pre- and postsurgery clinical data and VABS developmental quotients (DQ) were collected and compared across groups.
• Statistical analysis was performed to identify factors influencing postsurgery outcomes.

Main Results:

• Children without a history of IS were older at surgery and had longer epilepsy durations compared to those with IS.
• Despite similar underlying causes, surgical procedures, and seizure frequencies, developmental outcomes varied.
• Early surgical intervention was consistently associated with better postsurgery VABS-DQ scores across all patient groups.

Conclusions:

• Early surgical intervention is crucial for improving adaptive behavior in children with infant-onset epilepsy, irrespective of infantile spasms.
• Patients with infant-onset epilepsy, with or without IS, are susceptible to seizure-induced encephalopathy.
• These findings underscore the importance of timely neurosurgical evaluation and intervention for optimizing developmental trajectories in this population.