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Gelastic epilepsy: symptomatic and cryptogenic cases.

S Striano1, R Meo, L Bilo

  • 1Department of Neurological Sciences, Epilepsy Center, Federico II University, Naples, Italy.

Epilepsia
|March 18, 1999
PubMed
Summary
This summary is machine-generated.

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Gelastic seizures (GSs), characterized by laughing attacks, often stem from hypothalamic hamartomas (HHs) or can occur without MRI lesions. While symptomatic cases may be drug-resistant, cryptogenic GSs often have a more benign clinical course.

Area of Science:

  • Neurology
  • Epileptology
  • Neuroimaging

Background:

  • Gelastic seizures (GSs) are a distinct epilepsy syndrome characterized by involuntary laughing attacks.
  • The underlying etiology and clinical progression of GSs can vary significantly among patients.
  • Understanding the relationship between neuroimaging findings and seizure semiology is crucial for diagnosis and management.

Purpose of the Study:

  • To elucidate the causes, clinical features, and evolution of epilepsy presenting with gelastic seizures (GSs).
  • To investigate the role of magnetic resonance imaging (MRI) in identifying the origin of GSs.
  • To compare the clinical course of symptomatic versus cryptogenic GSs.

Main Methods:

  • Retrospective analysis of nine patients with gelastic seizures (GSs) observed between 1986 and 1997.

Related Experiment Videos

  • Inclusion criteria included electroencephalogram (EEG) or video-EEG confirmation of GSs and MRI.
  • Patients were categorized into symptomatic (with lesions) and cryptogenic (without lesions) groups.

    • Main Results:

    • Five patients had symptomatic localization-related epilepsy (LRE), primarily due to hypothalamic hamartoma (HH) or tuberous sclerosis (TS).
    • Four patients presented with cryptogenic epilepsy, showing normal MRI findings but focal seizure origins suggested by EEG.
    • HH-related epilepsy was often drug-resistant, while cryptogenic cases exhibited variable but generally more benign clinical evolution without cognitive deficits.

    Conclusions:

    • Hypothalamic hamartomas (HHs) are frequently associated with gelastic seizures (GSs).
    • GSs can occur in patients with normal neurological status and no MRI lesions, mimicking symptomatic cases in semiology.
    • Cryptogenic GSs generally follow a more favorable clinical course compared to symptomatic epilepsy.