|Description||Hemiconvulsion-hemiplegia-epilepsy (HHE) syndrome is a rare condition involving sudden and prolonged unilateral seizures in infancy and early childhood, followed by hemiplegia. The prolonged focal motor seizure usually occurs during the course of a febrile illness and is followed by hemiplegia ipsilateral to the side of convulsions. Although hemiplegia is usually permanent, it may disappear in about 20% of cases. Some patients with familial hemiplegic migraine and manifesting the S218L mutation in CACNA1A were reported to experience severe attacks with unilateral cerebral edema after trivial head trauma. It has shown that CACNA1A associate with HHE and familial hemiplegic migraine, and suggested that similar pathogenic mechanisms may underlie these two disorders.|
|Category||Nervous system disease|
|Gene||CACNA1A [HSA:773] [KO:K04344]|
|Comment||See also H00775 Familial or sporadic hemiplegic migraine.|
|Other DBs||ICD-11: 8A62.Y
AUTHORS Auvin S, Bellavoine V, Merdariu D, Delanoe C, Elmaleh-Berges M, Gressens P, Boespflug-Tanguy O
TITLE Hemiconvulsion-hemiplegia-epilepsy syndrome: current understandings.
JOURNAL Eur J Paediatr Neurol 16:413-21 (2012)
AUTHORS Bhat RY, Kakkar S, Prakashini K
TITLE Hemiconvulsion-hemiplegia-epilepsy syndrome: clinical course and neuroradiological features in a 20-month-old girl.
JOURNAL BMJ Case Rep 2014:bcr2013203482 (2014)
AUTHORS Yamazaki S, Ikeno K, Abe T, Tohyama J, Adachi Y
TITLE Hemiconvulsion-hemiplegia-epilepsy syndrome associated with CACNA1A S218L mutation.
JOURNAL Pediatr Neurol 45:193-6 (2011)