Electroclinical Features in MECP2 Duplication Syndrome: Pediatric Case Series
Jocelyn Lorenzo1,2, Alison Dolce1,2, Andrea Lowden1,2
1University of Texas Southwestern Medical Center, Dallas, TX, USA.
Insights
MECP2 duplication syndrome (MECP2DS) often causes epilepsy, with atonic seizures being most common. Most patients experienced pharmacoresistant epilepsy, highlighting the need for better management strategies.
Area of Science:
- Genetics
- Neurology
- Pediatrics
Background:
- MECP2 duplication syndrome (MECP2DS) is an X-linked disorder.
- It is characterized by hypotonia, neurodevelopmental delay, spasticity, infections, and seizures.
- Epilepsy affects over 50% of individuals with MECP2DS, but seizure semiology and EEG findings are not well-documented.
Purpose of the Study:
- To describe the electroclinical features of epilepsy in children with MECP2DS.
- To review seizure types and therapies used in these patients.
- To provide practical guidance for managing epilepsy in MECP2DS.
Main Methods:
- A case series approach was used.
- Electroclinical features of children with MECP2DS were described.
- Seizure types and therapies were reviewed.
Main Results:
- Eight of nine patients with MECP2DS developed epilepsy.
- Atonic seizures were the most common seizure semiology.
- The majority of patients (63%) had pharmacoresistant epilepsy.
Conclusions:
- Epilepsy is a common feature of MECP2DS.
- Atonic seizures and pharmacoresistance are characteristic.
- Further research is needed to define optimal management strategies.
Objective:
MECP2 duplication syndrome (MECP2DS) is an x-linked recessive syndrome characterized by infantile hypotonia, severe neurodevelopmental delay, intellectual disability, progressive spasticity, recurrent infections, and seizures. More than 50% of cases have been associated with epilepsy. Seizure semiology and electroencephalogram (EEG) findings in these patients are poorly described.
Methods:
In this case series, the authors describe the electroclinical features of children with MECP2DS presenting to their institution. In addition, they reviewed seizure types and therapies used.
Results:
Eight out of 9 patients with MECP2DS developed epilepsy, with 56% having normal initial EEG. Generalized slowing with generalized and focal/multifocal discharges was the most common EEG pattern which is consistent with prior studies. Atonic seizure was the most common semiology. Majority were pharmacoresistant (63%).
Conclusion:
The goal of this case series is to better define the clinical and electrophysiological aspects of the epilepsy associated with MECP2 duplication syndrome and provide practical guidance regarding management.
