Mondo Description Any autosomal recessive non-syndromic intellectual disability in which the cause of the disease is a mutation in the NDST1 gene.

Uniprot Description A disorder characterized by significantly below average general intellectual functioning associated with impairments in adaptive behavior and manifested during the developmental period. MRT46 manifestations include delayed psychomotor development apparent from infancy or early childhood, delayed or absent expressive speech, hypotonia, and therapy-responsive seizures in some patients. Behavioral abnormalities are variable and include aggression, self-injurious behavior, and sleep disturbances.