RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A developmental and epileptic encephalopathy characterized by seizures with onset before 2 years of age, severe developmental delay, and in some patients hyperekplexia that has_material_basis_in X-linked recessive inheritance of a mutation in the ARHGEF9 gene on chromosome Xq22.1. (DO)
Synonyms:
exact_synonym:
DEE8; EIEE8; early infantile epileptic encephalopathy 8; hyperekplexia and epilepsy