Childhood Hard-To-Control Seizures Linked To Adult Disability

What was studied

This study looked at adults with tuberous sclerosis complex (TSC) who had a history of seizures and were followed at one center in Paris from 2005 to 2021. It was a retrospective study, meaning the researchers reviewed existing medical records rather than assigning treatments. Out of 180 adults with TSC, 148 who had ever had seizures were included.

The researchers collected information about seizure history, brain imaging, genetics, and disability. They defined seizure freedom as having no seizures for at least 12 months before the last follow-up visit. They defined disability as a modified Rankin Scale score greater than 2. They also compared people with TSC1 and TSC2 gene changes and described the small group whose epilepsy started in adulthood.

What they found

At the last follow-up, 41.2% of the adults were seizure-free for at least 12 months, while 34.5% had disability defined as a modified Rankin Scale score greater than 2.

The factor most strongly associated with ongoing seizures in adulthood was childhood drug-resistant epilepsy. Other factors were associated in univariable analysis, such as status epilepticus and severe intellectual disability, but after adjustment, childhood drug-resistant epilepsy was the only factor that remained significant for persistent adult seizures.

Disability in adulthood was associated in univariable analysis with seizure onset before age 1, spasms at onset, status epilepticus, and childhood drug-resistant epilepsy. After adjustment, spasms at onset and childhood drug-resistant epilepsy remained significantly associated with disability.

Adult-onset epilepsy was uncommon, seen in 5.4% of patients, and was generally mild. People with TSC2 mutations had more severe overall cognitive and organ involvement than those with TSC1, but TSC2 did not appear to influence whether seizures would continue in adulthood.

Limits of the evidence

This was a single-center study from Paris, so the results may not apply to all adults with TSC in other settings. It was retrospective, so it depended on what was recorded in medical charts, and some details may have been missing or unevenly documented.

The study can show associations between childhood seizure patterns and adult outcomes, but it cannot prove that one factor directly caused another. It also only included adults with TSC who had a seizure history, so the findings do not describe all people with TSC. The abstract does not give full details about treatments over time, which could also affect outcomes.

For families and caregivers

For families, this study suggests that seizure problems early in life, especially childhood drug-resistant epilepsy and spasms at onset, may be linked with a harder course later on in adults with TSC. It also suggests that some adults with TSC do become seizure-free, but many continue to have seizures or disability.

The findings support the idea of early, optimized seizure management, but this study does not test a specific treatment or prove that earlier treatment changes long-term outcomes. Families may find it helpful as background when talking with a neurology team about long-term monitoring and seizure management in TSC.

What to watch next

Stronger evidence would come from larger, multi-center studies that follow people with TSC over time and examine how early seizure patterns and management relate to adult outcomes.

Terms in this summary

tuberous sclerosis complex (TSC)

A genetic condition that can affect the brain and other organs and often causes seizures.

drug-resistant epilepsy

Epilepsy in which seizures continue despite trying appropriate seizure medicines.

status epilepticus

A seizure that lasts a long time or repeated seizures without recovery in between; it is a medical emergency.

infantile spasms

A seizure type seen in babies, often involving brief body jerks or stiffening.

retrospective study

A study that looks back at existing medical records or past data.

mosaic

A genetic change that is present in some of a person's cells but not all of them.

TSC1 and TSC2

The two main genes known to cause tuberous sclerosis complex.

modified Rankin Scale (mRS)

A scale used to measure disability and how much help a person needs with daily activities.