The correlation between tuber burden and epilepsy onset in children with tuberous sclerosis complex

Area of Science:

• Neurology
• Radiology
• Pediatric Epilepsy

Background:

• Early-onset epilepsy in Tuberous Sclerosis Complex (TSC) is a significant risk factor for neurodevelopmental issues and treatment resistance.
• Identifying predictive neuroimaging biomarkers is crucial for managing pediatric epilepsy in TSC.

Purpose of the Study:

• To identify neuroimaging biomarkers, specifically tuber brain proportion (TBP) and tuber type, that predict early seizure onset in TSC.
• To determine if these biomarkers predict response to anti-seizure medications (ASMs).

Main Methods:

• Retrospective analysis of 306 pediatric TSC patients' clinical data and MRI scans.
• Classification of cortical tubers into four subtypes with quantitative volumetric and TBP analyses.
• Univariate and multivariate regression to identify risk factors for early-onset epilepsy and poor ASM outcomes.

Main Results:

• 57.8% of patients experienced early-onset epilepsy (<12 months), and 66.7% had poor ASM response.
• Higher total TBP, type II/III TBP, and lobar TBP were associated with early onset (p < 0.05).
• Independent predictors of early-onset epilepsy included type II lesion TBP (OR: 2.63), cortical calcification (OR: 2.01), and SEN count (OR: 1.15). Type II lesion volume and TBP predicted poor ASM response (p < 0.001).

Conclusions:

• Type II tuber burden, cortical calcification, and SEN count are independent neuroimaging predictors of early-onset epilepsy in TSC.
• The volume and proportion of type II tubers are strongly associated with anti-seizure medication resistance.
• These findings support the clinical utility of neuroimaging for prognosis and guiding early interventions in TSC.