idiopathic hemiconvulsion-hemiplegia syndrome

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Disease Overview

A rare acute encephalopathy with inflammation-mediated status epilepticus characterized by infancy-onset of refractory unilateral, mainly clonic status epilepticus during or shortly after a febrile episode without evidence of central nervous system infection, followed by permanent or transient hemiplegia with a minimum duration of one week. The majority of children develop pharmaco-resistant epilepsy a few months later. Brain imaging shows edematous swelling of the affected hemisphere at the time of the initial status, followed by hemiatrophy that does not correlate with any vascular territory.


Synonyms

  • HHE syndrome
  • IHHS
  • hemiconvulsion-hemiplegia-epilepsy syndrome

GARD Disease Summary

The Genetic and Rare Diseases Information Center (GARD) has information and resources for patients, caregivers, and families that may be helpful before and after diagnosis of this condition. GARD is a program of the National Center for Advancing Translational Sciences (NCATS), part of the National Institutes of Health (NIH).

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Orphanet

Orphanet has a summary about this condition that may include information on the diagnosis, care, and treatment as well as other resources. Some of the information and resources are available in languages other than English. The summary may include medical terms, so we encourage you to share and discuss this information with your doctor. Orphanet is the French National Institute for Health and Medical Research and the Health Programme of the European Union.

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National Organization for Rare Disorders