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Exceptionally long absence status: multifactorial etiology, drug interactions and complications
M D D'Agostino1, F Andermann, F Dubeau
1Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.
Abstract:
To our knowledge, petit mal status lasting longer than 2-3 days has been documented only once [1]. We report a 66 year-old man with well-documented, idiopathic generalized epilepsy who developed petit mal status lasting 6 weeks. Valproate levels remained low because of interactions with phenytoin. When phenytoin was discontinued, valproate levels increased, and he progressively improved. Chronic ischemic changes in the white matter may have been an additional factor in the causation and, most likely, in the duration of his status. Exceptionally long status and stupor increase the risk of medical complications. Valproate remains the medication of choice for the treatment of petit mal status. Despite the extraordinary course in this patient, complete recovery took place, confirming the benign nature of even such a prolonged episode.
Insights
This study details an exceptionally long 6-week petit mal status in a 66-year-old man with epilepsy. Effective management involved adjusting valproate levels, demonstrating recovery is possible even in prolonged seizures.
Area of Science:
- Neurology
- Epileptology
Background:
- Petit mal status, a continuous absence seizure, is typically brief.
- Longer durations are rare, with documented cases lasting only 2-3 days.
Observation:
- A 66-year-old male with idiopathic generalized epilepsy presented with a 6-week petit mal status.
- Low valproate levels were noted due to drug interactions with phenytoin.
- Chronic ischemic white matter changes were observed as a potential contributing factor.
Findings:
- Discontinuation of phenytoin normalized valproate levels, leading to patient improvement.
- The prolonged seizure episode, lasting 6 weeks, eventually resolved completely.
- Valproate was confirmed as the primary treatment for petit mal status.
Implications:
- Exceptionally long petit mal status, though rare, can be managed effectively.
- Drug interactions significantly impact anticonvulsant efficacy and seizure duration.
- Complete recovery is achievable even after extended seizure episodes, highlighting the generally benign prognosis.