HYPEREKPLEXIA 2

General Information (adopted from Orphanet):

Synonyms, Signs: HKPX2
Number of Symptoms 4
OrphanetNr:
OMIM Id: 614619
ICD-10:
UMLs:
MeSH:
MedDRA:
Snomed:

Prevalence, inheritance and age of onset:

Prevalence: No data available.
Inheritance: Autosomal recessive inheritance
[Omim]
Age of onset:

Disease classification (adopted from Orphanet):

Parent Diseases: No data available.

Symptom Information: Sort by abundance 

1
(HPO:0000565) Esotropia 7/9 [HPO:probinson] 58 / 7739
2
(HPO:0001276) Hypertonia 317 / 7739
3
(HPO:0002267) Exaggerated startle response 42 / 7739
4
(HPO:0000007) Autosomal recessive inheritance 2538 / 7739

Associated genes:

ClinVar (via SNiPA)

Gene symbol Variation Clinical significance Reference

Additional Information:

Clinical Description OMIM Rees et al. (2002) reported a male neonate who presented with generalized hypertonia and hyperreactivity 3 hours after birth. He had an exaggerated startle response and myoclonus elicited by testing the tendon reflexes or tapping on the back. ...
Molecular genetics OMIM In a patient with hyperekplexia-2, Rees et al. (2002) identified compound heterozygosity for 2 mutations in the GLRB gene (138492.0001-138492.0002). Each unaffected parent was heterozygous for 1 of the mutations. Electrophysiologic studies showed reduced sensitivity to agonist-mediated activation ...