title: X-linked mental retardation without physical abnormality (Renpenning's syndrome) in sibs in an institution.
mesh_terms: D000293:Adolescent; D000328:Adult; D000596:Amino Acids / Q000652:urine; D005260:Female; D005808:Genes, Recessive; D005817:Genetic Counseling; D006025:Glycosaminoglycans / Q000652:urine; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics* / Q000652:urine; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D010808:Physical Examination; D012730:Sex Chromosomes; D012737:Sex Factors; D013577:Syndrome
chemical_list: D000596:Amino Acids; D006025:Glycosaminoglycans