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Nonfebrile illness seizures: a unique seizure category?
Danielle M Zerr1, Heidi K Blume, Anne T Berg
1Department of Pediatrics, University of Washington, Seattle, Washington 98105, USA. zerr@u.washington.edu
Insights
Children experiencing a first-time nonfebrile seizure during mild illness, particularly with diarrhea, may represent a unique seizure group. Further research is needed to define these nonfebrile illness seizures and their epidemiology.
Area of Science:
- Pediatric Neurology
- Epilepsy Research
- Clinical Pediatrics
Background:
- First-time seizures in children require careful evaluation.
- Differentiating between febrile, unprovoked, and illness-associated seizures is crucial.
- The role of mild, non-febrile illness in seizure presentation is not well-defined.
Purpose of the Study:
- To characterize children with first-time nonfebrile seizures during mild illness.
- To investigate the association between nonfebrile illness seizures and diarrhea.
- To explore the potential for a distinct epidemiological profile of nonfebrile illness seizures.
Main Methods:
- Retrospective cohort study in a pediatric emergency department.
- Inclusion of children aged 6 months to 6 years with first-time seizures.
- Categorization into febrile, unprovoked, and nonfebrile illness seizure groups based on accompanying symptoms.
Main Results:
- 39 (12%) of 323 children had nonfebrile illness seizures.
- Nonfebrile illness seizures were significantly more likely to be associated with diarrhea (44% vs. 16%, p=0.001) compared to febrile seizures.
- No significant differences in cough, rhinorrhea, or rash were observed between febrile and nonfebrile illness seizure groups.
Conclusions:
- Nonfebrile illness seizures may constitute a distinct seizure category with unique epidemiological features.
- Further investigation is warranted to better define this specific group of seizures.
- Understanding nonfebrile illness seizures can refine diagnostic and management approaches in pediatric epilepsy.
Purpose:
To describe the clinical characteristics of children with a first-time nonfebrile seizure in the setting of mild illness and to test the hypothesis that these seizures are associated with illness characterized by diarrhea.
Methods:
This retrospective cohort study was performed in a pediatric emergency department. Patients ages 6 months to 6 years who were evaluated with first-time seizures were eligible for inclusion. Subjects were divided into three groups on the basis of symptoms accompanying their seizure: febrile (temperature, >38.0 degrees C with seizure), unprovoked (no symptoms of illness), and nonfebrile illness (no fever at the time of seizure, but other symptoms of illness present).
Results:
Of the 323 children with first-time seizures, 247 (76%) had febrile seizure, 37 (12%) had unprovoked seizures, and 39 (12%) had nonfebrile illness seizures. Children with nonfebrile illness seizures were more likely than children with febrile seizures to have diarrheal illnesses accompanying their seizure (44 vs. 16%; p=0.001). Frequency of cough, rhinorrhea, and rash did not differ significantly between children with febrile and nonfebrile illness seizures. Diagnostic testing for infectious etiologies was not performed frequently in either group.
Conclusions:
Nonfebrile illness seizures may represent a distinct group of seizures with unique epidemiology. Further study to define this seizure group better is warranted.
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