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"Obtundation status (Dravet)" caused by complex partial status epilepticus in a patient with severe myoclonic
1Department of Pediatrics, Sapporo Medical University School of Medicine, Japan.
Insights
This study documents complex partial status epilepticus (CPSE) in an infant with severe myoclonic epilepsy in infancy (SME). This finding highlights the diverse seizure presentations in early childhood epilepsy syndromes.
Area of Science:
- Pediatric Neurology
- Epileptology
- Clinical Neurophysiology
Background:
- Severe myoclonic epilepsy in infancy (SME) is characterized by intractable seizures, often including both generalized and focal types.
- Early diagnosis and understanding of seizure manifestations are crucial for managing this severe epilepsy syndrome.
Observation:
- A 1-year 7-month-old boy with SME presented with complex partial status epilepticus (CPSE), confirmed by ictal video-EEG.
- The patient experienced intractable partial and generalized seizures since 3 months of age, including an episode consistent with 'obtundation status'.
Findings:
- Ictal EEG demonstrated persisting left-hemisphere spike-and-wave complexes, confirming CPSE.
- EEG abnormalities and decreased consciousness persisted for approximately 6 hours despite anti-epileptic drug administration.
Implications:
- This case demonstrates that CPSE can occur in infants with SME, expanding the spectrum of nonconvulsive status epilepticus in this population.
- Recognizing CPSE is important for appropriate management, especially given the potential for prolonged impairment in SME patients.
Purpose:
We report a 1-year 7-month-old boy with severe myoclonic epilepsy in infancy (SME) who exhibited complex partial status epilepticus (CPSE), which was confirmed by ictal video-EEG analysis. This boy first had a hemiconvulsion in a hot bath at age 3 months. Thereafter, he exhibited both partial and generalized seizures that were extremely intractable. At age 9 months, he had a prolonged episode of impaired consciousness that fit the "obtundation status in SME" defined by Dravet et al.
Methods And Results:
Ictal EEG revealed persisting irregular spike-and-wave complexes over the left hemisphere, predominantly in the occipitotemporal area, and confirmed CPSE. The EEG abnormalities with decreased level of the consciousness continued approximately 6 h after onset of the symptoms even with AED administration.
Conclusions:
Because SME features both generalized and focal seizures, both types of nonconvulsive status may be seen in SME. Although Dravet et al. already reported long-lasting atypical absences in patients with SME as "obtundation status," we demonstrated CPSE in an infant with SME who exhibited a prolonged stuporous state.