title: X-linked mental retardation associated with macro-orchidism.
abstract: Two families are described with an X-linked form of mental retardation in whom the affected males were found to have bilateral enlargement of the testes. No conclusive evidence of any endocrinological disturbance was found.
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D008607:Intellectual Disability / Q000150:complications / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D012730:Sex Chromosomes; D013733:Testicular Diseases / Q000150:complications / Q000235:genetics*