X-linked intellectual disability, Pai type is characterized by the association of dysmorphism with intellectual deficit. It has been described in four generations of one family. Premature death was reported in the affected males. Transmission is X-linked recessive and the causative gene has been localized to the q28 region of the X chromosome. The disease is Monarch Disease Ontology term MONDO_0019420 (X-linked intellectual disability, Pai type).