While genetic changes in HUWE1 are associated with other neurodevelopmental conditions, such as seizure/epilepsy, autism and schizophrenia, we primarily focus on ID because it has the most compelling links to HUWE1. Patients with HUWE1 genetic changes do have developmental abnormalities outside of the nervous system (for example slowed growth and altered facial features) that we do not comment on here. The gene discussed is HUWE1; the disease is epilepsy.