The Atlas of X-Linked Intellectual Disability Syndromes is a comprehensive and up-to-date summary of the clinically distinctive disorders caused by genes on the X chromosome. Clinical and laboratory data on 150 syndromes are presented in a concise and consistent manner. Each syndrome is defined and information is provided on somatic features, growth and development, neurological signs, cognitive performance, imaging and other laboratory findings, and when possible, the nature and localization of the responsible gene. Craniofacial and other somatic findings are extensively...