X-linked intellectual disability, Cantagrel type (MONDO_0010483) is an X-linked syndromic intellectual disability characterized by marked neonatal hypotonia, progressive quadriparesia, severely delayed developmental milestones (walking at 3 years of age), gastroesophageal reflux, stereotypic movements of the hands, esotropia and infantile autism. Also known as: MRX98, X-linked intellectual developmental disorder-98, X-linked intellectual disability-98, XLID98, intellectual disability, X-linked 98, intellectual disability, X-linked type 98, mental retardation, X-linked 98, mental retardation, X-linked type 98.