Epilepsy in TSC: certain etiology does not mean certain prognosis

Area of Science:

• Neurology
• Genetics
• Epileptology

Background:

• Tuberous sclerosis complex (TSC) is a genetic disorder with variable epilepsy prevalence and outcomes.
• Understanding factors influencing epilepsy course in TSC is crucial for patient management.

Purpose of the Study:

• To investigate the prevalence and long-term outcomes of epilepsy in a cohort of patients with TSC.
• To identify clinical, EEG, MRI, and genetic factors associated with epilepsy development and refractoriness in TSC.

Main Methods:

• Retrospective review of clinical data from 160 patients with TSC followed at a specialized center.
• Data collected included epilepsy onset, seizure types, treatment response, EEG, MRI findings, cognitive status, and genetic mutations.
• Statistical analysis to identify correlations between clinical characteristics and epilepsy outcomes.

Main Results:

• Epilepsy was present in 72.5% of patients; 35.6% were seizure-free, and 36.9% had drug-resistant epilepsy.
• Early epilepsy onset (first year), infantile spasms, cognitive impairment, and TSC2 mutations were associated with drug-resistant epilepsy.
• Most seizure-free patients had focal epilepsy; 54.4% experienced drug resistance previously.

Conclusions:

• Epilepsy management in TSC can be challenging, but over a third of patients achieve seizure control.
• Monotherapy controlled seizures in 56% of treated patients, and 12% became seizure and medication-free.
• Identifying predictive factors for epilepsy and cognitive outcomes is essential for personalized management and understanding genotype-phenotype correlations in TSC.