title: Mental retardation, megalotestes and a marker X chromosome.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002873:Chromosome Fragility; D005260:Female; D005819:Genetic Markers; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D012729:Sex Chromosome Aberrations / Q000235:genetics*; D012730:Sex Chromosomes; D013737:Testis / Q000002:abnormalities*; D014960:X Chromosome
chemical_list: D005819:Genetic Markers