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:
NEURODEVELOPMENTAL DISORDER WITH POOR GROWTH, ABSENT SPEECH, PROGRESSIVE ATAXIA, AND DYSMORPHIC FACIES
This disease is a severe autosomal recessive disorder with onset of symptoms in infancy. Affected individuals have poor overall growth (microcephaly, short stature), dysmorphic facies, delayed motor development with ataxic or spastic gait, and impaired intellectual development with absent speech.