Epilepsy Severity Is Associated With Head Circumference and Growth Rate in Infants With Tuberous Sclerosis Complex

Area of Science:

• Neurology
• Pediatrics
• Genetics

Background:

• Tuberous sclerosis complex (TSC) is characterized by abnormal brain growth, leading to epilepsy and neurological issues.
• Head circumference (HC) serves as a clinical indicator of brain overgrowth and disease burden in TSC.
• Understanding the relationship between HC and epilepsy is crucial for managing TSC.

Purpose of the Study:

• To investigate the association between head circumference (HC) and epilepsy severity in infants diagnosed with tuberous sclerosis complex (TSC).
• To determine if HC can serve as a predictive measure for neurological disease burden in TSC.

Main Methods:

• A prospective, multicenter observational study involving infants with TSC from birth to three years.
• Epilepsy data collected via clinical history; HC measured at multiple study visits up to 36 months.
• Epilepsy severity categorized into four levels: none, low, moderate, and high, based on seizure types and antiepileptic drug (AED) use.

Main Results:

• Children with TSC exhibited HCs approximately 1 SD above WHO reference means by age one, with accelerated growth compared to the general population.
• Males with epilepsy had larger HCs than those without epilepsy.
• Infants with TSC and no/low/moderate epilepsy showed increased early HC growth rates; those with severe epilepsy had larger early HCs but not faster growth rates.

Conclusions:

• Infants and young children with TSC demonstrate larger head circumferences compared to standard growth norms.
• Head growth rates in TSC vary significantly based on the presence and severity of epilepsy.