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.
Term:
DEVELOPMENTAL DELAY, IMPAIRED SPEECH, AND BEHAVIORAL ABNORMALITIES, WITH OR WITHOUT SEIZURES
This is a neurodevelopmental disorder characterized by variably impaired skill acquisition apparent from infancy or early childhood. Affected individuals have predominant language delay with mild fine and gross motor deficits. Most patients have mild to moderately impaired intellectual development and behavioral abnormalities, including aggression, hyperactivity, and autism spectrum disorder.