A CASE OF A MENTALLY DEFECTIVE MALE WITH XXYY SEX CHROMOSOME CONSTITUTION.
D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D006801:Humans; D008607:Intellectual Disability; D007713:Klinefelter Syndrome; D012730:Sex Chromosomes
CHROMOSOME ABNORMALITIES; KLINEFELTER'S SYNDROME; MENTAL RETARDATION