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Neuro-cognitive development and epilepsy outcome in children with surgically treated hemimegalencephaly
D Battaglia1, C Di Rocco, L Iuvone
1Child Neurology and Psychiatry Unit, UCSC, Rome, Italy.
Insights
Hemispherectomy surgery improved epilepsy in most children with hemimegalencephaly, but cognitive outcomes varied. Early development and brain imaging influenced cognitive results post-surgery.
Area of Science:
- Pediatric Neurology
- Neurosurgery
Background:
- Hemimegalencephaly is a rare congenital brain malformation often associated with intractable epilepsy and developmental delays.
- Hemispherectomy, a surgical procedure involving the removal or disconnection of one cerebral hemisphere, is a treatment option for severe, intractable epilepsy in pediatric cases.
Purpose of the Study:
- To evaluate the long-term outcomes of hemispherectomy in patients with hemimegalencephaly and refractory epilepsy.
- To identify factors associated with better cognitive outcomes after hemispherectomy.
Main Methods:
- A long-term follow-up study of 10 patients diagnosed with hemimegalencephaly and refractory epilepsy.
- Patients underwent hemispherectomy between 5 months and 4 years of age, with a mean follow-up of 5 years and 2 months.
Main Results:
- Epilepsy improved significantly in most patients; 6 became seizure-free, and 2 had only dystonic fits.
- Cognitive outcomes were generally less favorable, though all patients showed some cognitive improvement.
- Neurological deficits did not worsen post-surgery, and quality of life significantly improved.
Conclusions:
- Hemispherectomy can effectively control epilepsy in hemimegalencephaly, improving quality of life.
- Pre-operative cognitive development, neuroimaging findings, and the integrity of the unaffected hemisphere are crucial predictors of post-surgical cognitive outcomes.
Abstract:
We performed a long-term follow-up of 10 patients with hemimegalencephaly and refractory epilepsy, after having treated them with hemispherectomy. Before surgery, 9 patients presented with delayed motor and cognitive development. Surgery was performed between age 5 months and 4 years and 8 months; the mean postsurgical follow-up was 5 years and 2 months. The epilepsy improved in most cases: 6 patients became seizure-free and 2 presented only dystonic fits. The cognitive outcome was less favourable, even though some improvement of cognitive competence was found in all. The neurological deficit did not increase after surgery, and the quality of life improved significantly. A good cognitive development before surgery, less severe morphological changes in neuroimaging, and functional and anatomical integrity of the "healthy" hemisphere seem to be associated with a better cognitive outcome.