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Epilepsy, idiopathic generalized, susceptibility to, 8(EIG8)

MedGen UID:
414549
Concept ID:
C2752062
Finding
Synonym: Epilepsy, idiopathic generalized 8
 
Gene (location): CASR (3q13.33-21.1)
 
Monarch Initiative: MONDO:0013032
OMIM®: 612899

Definition

Any generalized epilepsy in which the cause of the disease is a mutation in the CASR gene. [from MONDO]

Clinical features

From HPO
Febrile seizure (within the age range of 3 months to 6 years)
MedGen UID:
3232
Concept ID:
C0009952
Disease or Syndrome
A febrile seizure is any type of seizure (most often a generalized tonic-clonic seizure) occurring with fever (at least 38 degrees Celsius) but in the absence of central nervous system infection, severe metabolic disturbance or other alternative precipitant in children between the ages of 3 months and 6 years.
Myoclonus
MedGen UID:
10234
Concept ID:
C0027066
Finding
Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements.
Seizure
MedGen UID:
20693
Concept ID:
C0036572
Sign or Symptom
A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.
Focal impaired awareness seizure
MedGen UID:
543022
Concept ID:
C0270834
Disease or Syndrome
Focal impaired awareness seizure (or focal seizure with impaired or lost awareness) is a type of focal-onset seizure characterized by some degree (which may be partial) of impairment of the person's awareness of themselves or their surroundings at any point during the seizure.
Bilateral tonic-clonic seizure
MedGen UID:
141670
Concept ID:
C0494475
Sign or Symptom
A bilateral tonic-clonic seizure is a seizure defined by a tonic (bilateral increased tone, lasting seconds to minutes) and then a clonic (bilateral sustained rhythmic jerking) phase.
Generalized non-motor (absence) seizure
MedGen UID:
1385688
Concept ID:
C4316903
Disease or Syndrome
A generalized non-motor (absence) seizure is a type of a type of dialeptic seizure that is of electrographically generalized onset. It is a generalized seizure characterized by an interruption of activities, a blank stare, and usually the person will be unresponsive when spoken to. Any ictal motor phenomena are minor in comparison to these non-motor features.

Recent clinical studies

Etiology

Peña-Ceballos J, Moloney PB, Kilbride RD, Naggar HE, Widdess-Walsh P, Delanty N
Epilepsy Res 2024 May;202:107362. Epub 2024 Apr 19 doi: 10.1016/j.eplepsyres.2024.107362. PMID: 38652996
Arsov T, Mullen SA, Rogers S, Phillips AM, Lawrence KM, Damiano JA, Goldberg-Stern H, Afawi Z, Kivity S, Trager C, Petrou S, Berkovic SF, Scheffer IE
Ann Neurol 2012 Nov;72(5):807-15. doi: 10.1002/ana.23702. PMID: 23280796

Diagnosis

Arsov T, Mullen SA, Rogers S, Phillips AM, Lawrence KM, Damiano JA, Goldberg-Stern H, Afawi Z, Kivity S, Trager C, Petrou S, Berkovic SF, Scheffer IE
Ann Neurol 2012 Nov;72(5):807-15. doi: 10.1002/ana.23702. PMID: 23280796

Therapy

Peña-Ceballos J, Moloney PB, Kilbride RD, Naggar HE, Widdess-Walsh P, Delanty N
Epilepsy Res 2024 May;202:107362. Epub 2024 Apr 19 doi: 10.1016/j.eplepsyres.2024.107362. PMID: 38652996

Prognosis

Peña-Ceballos J, Moloney PB, Kilbride RD, Naggar HE, Widdess-Walsh P, Delanty N
Epilepsy Res 2024 May;202:107362. Epub 2024 Apr 19 doi: 10.1016/j.eplepsyres.2024.107362. PMID: 38652996
Arsov T, Mullen SA, Rogers S, Phillips AM, Lawrence KM, Damiano JA, Goldberg-Stern H, Afawi Z, Kivity S, Trager C, Petrou S, Berkovic SF, Scheffer IE
Ann Neurol 2012 Nov;72(5):807-15. doi: 10.1002/ana.23702. PMID: 23280796

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