Epileptic spasms in paediatric post-traumatic epilepsy at a tertiary referral centre

Area of Science:

• Pediatric Neurology
• Neurotraumatology
• Epileptology

Background:

• Traumatic brain injury (TBI) is a significant cause of acquired epilepsy in children.
• Epileptic spasms (ES) are a distinct seizure type, but their occurrence and mechanisms post-TBI are not well understood.
• Understanding ES post-TBI is crucial for early diagnosis and intervention in pediatric populations.

Purpose of the Study:

• To recognize epileptic spasms (ES) as a specific seizure type following traumatic brain injury (TBI) in infants and children.
• To investigate the potential mechanisms of epileptogenesis contributing to ES after TBI.
• To determine the incidence and clinical characteristics of ES in children with TBI.

Main Methods:

• Retrospective electronic chart review of 321 pediatric patients at the Children's Hospital of Michigan (2002-2012).
• Inclusion criteria: patients diagnosed with post-traumatic epilepsy (PTE).
• Data collected: age at TBI, trauma mechanism, injury severity, EEG/neuroimaging, seizure semiology, and treatment outcomes.

Main Results:

• Six out of 47 patients (12.8%) with PTE were diagnosed with ES, occurring 2 months to 2 years post-TBI.
• All ES patients exhibited multifocal epileptiform discharges, cognitive delay, and epileptic encephalopathy.
• The overall risk of PTE was 14.6%, with a specific risk of ES post-TBI at 1.8%. Non-accidental head trauma and severe TBI in infancy were identified as risk factors.

Conclusions:

• Epileptic spasms represent a distinct seizure type following TBI in children, often associated with significant neurological comorbidities.
• Non-accidental head trauma and TBI during infancy are significant risk factors for developing ES.
• The pathophysiology may involve cortical abnormalities interacting with subcortical structures during critical maturation stages.