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 SEVERE MOTOR IMPAIRMENT, ABSENT LANGUAGE, CEREBRAL HYPOMYELINATION, AND BRAIN ATROPHY
This disease is characterized by the onset of these features soon after birth or in early infancy. Affected individuals make almost no developmental progress, are unable to sit or walk, do not acquire speech, have poor visual fixation, and show poor overall growth associated with feeding problems. Brain imaging shows hypomyelination, thin corpus callosum, and cerebral and cerebellar atrophy.
ClinVar Annotator: match by term: Neurodevelopmental disorder with severe motor impairment, absent language, cerebral hypomyelination, and brain atrophy